Pandora Wiki - User contributions [en]

Overclocking

2013-11-06T13:39:43Z

Jonsneyers:

Several components of the Pandora can be overclocked: the CPU, the system bus, and the DSP. The clock speed of the system bus also determines the clock speed of the RAM and the GPU. Overclocking the CPU is relatively well understood and harmless: the worst that can happen is that your system freezes and you need to reboot - but there is a CPU stress test available which helps to find a safe overclock speed. Overclocking the DSP is also considered to be safe. Overclocking the system bus is more dangerous, since problems may not be noticable immediately and there is no stress test available to find a safe system bus overclock speed for your unit. Because of this, overclocking the system bus may lead to SD card data corruption and other problems.

Overclocking can make CPU- and/or GPU-intensive programs (such as an N64 emulator) run smoother. Set too high, your Pandora can freeze up. If this occurs, you can force a restart by holding the Pandora button and sliding the power switch to the right. If you still have problems, take out your battery for a minute before turning on your Pandora (this will discharge the backup capacitor that was designed to retain RTC while the battery is being changed [http://www.gp32x.com/board/index.php?/topic/57303-overclocking-broke-my-pandora/page__view__findpost__p__924479])

[[Overclocking]] functionality is provided through 2 files in /proc/pandora/: cpu_mhz_max and cpu_opp_max. The *mhz* one refers to raw ARM CPU clock, *opp* one refers to TI's OPP concept - voltage+clock pairs. As far as this implementation is concerned, OPP basically means CPU voltage levels. Achieving certain clock values requires having certain minimum OPP set, for example, most units need OPP 4 or 5 to go above 800MHz. Trying to up the clock on too low OPP will crash the machine.

==How to Overclock==
'''Notes:'''

The OMAP core will actually adjust its speed to match the load; you are setting the ''upper limit''. On its own, reducing the clock speed has little impact on battery life.

The operating voltage is specified as an 'opp' in the range 1-5, with 3 being the default.

===Graphical Tools===
"System" → "CPU-Speed". This gives you a slider to set the desired MHz. Since Hot Fix 5, the maximum and minimum values can be set by using a separate tool (previously, it was limited from 14 to 900MHz).

"Settings" → "CPU-Settings".
A second tool was introduced in Hot Fix 5 which allows you to set the maximum OPP level, define the minimum/maximum clock speeds, change the way the "CPU-Speed" script warns you, and define a default clock speed.

You can also use [http://repo.openpandora.org/?page=detail&app=sysinfo.wb Pandora System Info] to set the clock speed of the CPU. At the CPU information panel (press "C" or "1" to go to that panel), press the "<" and ">" keys (or rather "," and ".") to change the clock speed. You can change it faster by holding L1 (10MHz increments) or R1 (100MHz increments).

===Terminal Commands===

To set OPP5:
<source lang="bash">echo 5 > /proc/pandora/cpu_opp_max</source>

To set your CPU speed: 
see [[Kernel_interface#Overclocking|Overclocking]]

==Voltage Scaling==
{{warning|OverVolting can potentially halve the lifespan of your Pandora}}
OverVolting can be achieved by adjusting the [[Power_modes#Opperating_Point|operating point (OPP)]]

At low frequencies, the OMAP CPU can still work with a reduced voltage, and that causes it to drain the battery a little slower. Alternatively, you can increase the voltage and maybe get a higher overclock. '''This WILL reduce the lifetime of your Pandora.''' 3 is the default OPP.

If you reduce the CPU speed below specific thresholds, the voltage will automatically adjust downwards. If you set the OPP to 1 whilst still running at the default 500 MHz, your Pandora is very likely to crash. At 4, you may see almost as good an overclock performance as at 5.

==App-specific Speed Control==
It is possible to auto configure specific applications to increase the CPU speed whilst running. Applications can be configured to prompt with a suggested speed, and you are given the option to select a speed, making the choice persistent if desired. This is done by placing a '''cpuspeed file''' in the /pandora/appdata/{pnd_name}/ directory. Delete the file to have the app ask again next time it is run.
Some apps, such as PCSX-rearmed, also allows on-the-go overclocking thanks to the sdk.

==Warranty information==
OPP5 and 1Ghz is the maximum level that is covered by warranty.[http://boards.openpandora.org/index.php?/topic/2993-overclocking-questions/page__st__20__p__71694#entry71694]

== Linux kernel info ==

Exact meaning of /proc/ files is slightly different on different kernel versions:
=== 2.6.27 ===
* cpu_mhz_max - sets CPU clock to value written (in MHz), plain and simple.
* cpu_opp_max - sets maximum opp level (1-5). The actual OPP level set in hardware will depend on cpu_mhz_max (but will never exceed cpu_opp_max):
{|
|-
|mhz:
|0-125
|126-250
|251-600
|601-720
|720-inf.
|-
|opp:
|1
|2
|3
|4
|5
|}
This is more optimistic than TI recommendations, but was experimentally determined to work in most cases.
=== 3.2+ ===
On 3.2 this has been reworked to use cpufreq:
* cpu_mhz_max - set the maximum clock cpufreq can set
* cpu_opp_max - set the maximum OPP level cpufreq can set
cpufreq can then scale OPP and frequency automatically depending on CPU usage, if "ondemand" governor is set. Governor can be checked/changed by reading/writing
<source lang="bash">
/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
</source>
list of available governors is at
<source lang="bash">
/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors
</source>
(some may need to be modprobe'd before use).
If "ondemand" governor is not set, cpufreq/scaling_governor must be updated after cpu_mhz_max is set (can write the same value as previous one).
=== config ===
Firmware overclocking tools use /etc/pandora/conf/cpu.conf to limit cpu_mhz_max and cpu_opp_max.
[[Category:Tutorials]]
[[Category:Optimization]]

Overclocking

2013-11-06T13:27:17Z

Jonsneyers: added sysinfo information

This can make CPU-intensive programs (such as an N64 emulator) run smoother. Set too high, your Pandora can freeze up. If this occurs, you can force a restart by holding the Pandora button and sliding the power switch to the right. If you still have problems, take out your battery for a minute before turning on your Pandora (this will discharge the backup capacitor that was designed to retain RTC while the battery is being changed [http://www.gp32x.com/board/index.php?/topic/57303-overclocking-broke-my-pandora/page__view__findpost__p__924479])

[[Overclocking]] functionality is provided through 2 files in /proc/pandora/: cpu_mhz_max and cpu_opp_max. The *mhz* one refers to raw ARM CPU clock, *opp* one refers to TI's OPP concept - voltage+clock pairs. As far as this implementation is concerned, OPP basically means CPU voltage levels. Achieving certain clock values requires having certain minimum OPP set, for example, most units need OPP 4 or 5 to go above 800MHz. Trying to up the clock on too low OPP will crash the machine.

==How to Overclock==
'''Notes:'''

The OMAP core will actually adjust its speed to match the load; you are setting the ''upper limit''. On its own, reducing the clock speed has little impact on battery life.

The operating voltage is specified as an 'opp' in the range 1-5, with 3 being the default.

===Graphical Tools===
"System" → "CPU-Speed". This gives you a slider to set the desired MHz. Since Hot Fix 5, the maximum and minimum values can be set by using a separate tool (previously, it was limited from 14 to 900MHz).

"Settings" → "CPU-Settings".
A second tool was introduced in Hot Fix 5 which allows you to set the maximum OPP level, define the minimum/maximum clock speeds, change the way the "CPU-Speed" script warns you, and define a default clock speed.

You can also use [http://repo.openpandora.org/?page=detail&app=sysinfo.wb Pandora System Info] to set the clock speed of the CPU. At the CPU information panel (press "C" or "1" to go to that panel), press the "<" and ">" keys (or rather "," and ".") to change the clock speed. You can change it faster by holding L1 (10MHz increments) or R1 (100MHz increments).

===Terminal Commands===

To set OPP5:
<source lang="bash">echo 5 > /proc/pandora/cpu_opp_max</source>

To set your CPU speed: 
see [[Kernel_interface#Overclocking|Overclocking]]

==Voltage Scaling==
{{warning|OverVolting can potentially halve the lifespan of your Pandora}}
OverVolting can be achieved by adjusting the [[Power_modes#Opperating_Point|operating point (OPP)]]

At low frequencies, the OMAP CPU can still work with a reduced voltage, and that causes it to drain the battery a little slower. Alternatively, you can increase the voltage and maybe get a higher overclock. '''This WILL reduce the lifetime of your Pandora.''' 3 is the default OPP.

If you reduce the CPU speed below specific thresholds, the voltage will automatically adjust downwards. If you set the OPP to 1 whilst still running at the default 500 MHz, your Pandora is very likely to crash. At 4, you may see almost as good an overclock performance as at 5.

==App-specific Speed Control==
It is possible to auto configure specific applications to increase the CPU speed whilst running. Applications can be configured to prompt with a suggested speed, and you are given the option to select a speed, making the choice persistent if desired. This is done by placing a '''cpuspeed file''' in the /pandora/appdata/{pnd_name}/ directory. Delete the file to have the app ask again next time it is run.
Some apps, such as PCSX-rearmed, also allows on-the-go overclocking thanks to the sdk.

==Warranty information==
OPP5 and 1Ghz is the maximum level that is covered by warranty.[http://boards.openpandora.org/index.php?/topic/2993-overclocking-questions/page__st__20__p__71694#entry71694]

== Linux kernel info ==

Exact meaning of /proc/ files is slightly different on different kernel versions:
=== 2.6.27 ===
* cpu_mhz_max - sets CPU clock to value written (in MHz), plain and simple.
* cpu_opp_max - sets maximum opp level (1-5). The actual OPP level set in hardware will depend on cpu_mhz_max (but will never exceed cpu_opp_max):
{|
|-
|mhz:
|0-125
|126-250
|251-600
|601-720
|720-inf.
|-
|opp:
|1
|2
|3
|4
|5
|}
This is more optimistic than TI recommendations, but was experimentally determined to work in most cases.
=== 3.2+ ===
On 3.2 this has been reworked to use cpufreq:
* cpu_mhz_max - set the maximum clock cpufreq can set
* cpu_opp_max - set the maximum OPP level cpufreq can set
cpufreq can then scale OPP and frequency automatically depending on CPU usage, if "ondemand" governor is set. Governor can be checked/changed by reading/writing
<source lang="bash">
/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
</source>
list of available governors is at
<source lang="bash">
/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors
</source>
(some may need to be modprobe'd before use).
If "ondemand" governor is not set, cpufreq/scaling_governor must be updated after cpu_mhz_max is set (can write the same value as previous one).
=== config ===
Firmware overclocking tools use /etc/pandora/conf/cpu.conf to limit cpu_mhz_max and cpu_opp_max.
[[Category:Tutorials]]
[[Category:Optimization]]

Team

2013-11-06T10:03:21Z

Jonsneyers: adding some projects to my name

[[File:Lead_Photo_For_Team0-5868644889808586.png|thumbnail|ED here, welcome to the team.]]

== Official Team ==
{|class=" sortable" border="0" cellpadding="1" cellspacing="0" style="font-size: 90%; border:1px solid gray; border-collapse: collapse;
|- style="background: #ececec"
!Forum
!IRC
!Real name
!µblog
!pages
!mod
!projects
!youtube
!flatter
!paypal
|-
|[http://boards.openpandora.org/index.php/user/1-evildragon/ Evildragon ]
|ED
|Michael Mrozek
|[https://twitter.com/EvilDragon1717]
|http://dragonbox.de https://github.com/EvilDragon
| X
|Project MOTU
|[http://www.youtube.com/user/EvilDragon1717]
|[https://flattr.com/profile/evildragon]
|[donation@openpandora.org|address
|-
|[http://boards.openpandora.org/index.php/user/76-notaz/ notaz]
|
|
|
|http://notaz.gp2x.de/
|
|kernel [[PicoDrive]]
|[http://www.youtube.com/user/notasaz]
|
|[https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=FZUBJTCLEPAY2]
|-
|[http://boards.openpandora.org/index.php/user/7-mweston/ Mweston]
|
|Michael Weston
|
|
|
|board design
|[http://www.youtube.com/user/MWeston2]
|
|
|-
|[http://boards.openpandora.org/index.php?/user/265-davec DaveC]
|
|
|
|
|
|case dpad and keymat
|
|
|
|-
|[http://boards.openpandora.org/index.php/user/86-skeezix/ skeezix]
|
|Jeff Mitchell
|
|https://github.com/skeezix
|
|libpnd minimenu Zikzak
|[http://www.youtube.com/user/skeezixcodejedi]
|
|
|-
|
|mfk
|M. Fatih Kilic
|[https://twitter.com/_mfk]
|[http://www.gp2xtr.com/ gp2xtr]
|
|sourcing parts
|
|
|
|-
|[http://boards.openpandora.org/index.php/user/69-pickle/ Pickle]
|
|Scott Smith
|
|
|
|GLES [[PickleLauncher]]
|[http://www.youtube.com/user/Pickle136]
|
|
|-
|[http://boards.openpandora.org/index.php/user/127-djwillis/ djwillis]
|
|John Willis
|
|http://www.distant-earth.com/index.html
|
|wifi
|[http://www.youtube.com/user/DavidJohnWillis]
|
|
|}

== Helpful People ==
{|class=" sortable" border="0" cellpadding="1" cellspacing="0" style="font-size: 90%; border:1px solid gray; border-collapse: collapse;
|- style="background: #ececec"
!Forum
!IRC
!Real name
!µblog
!pages
!mod
!projects
!youtube
!flatter
!paypal
|-
|[http://boards.openpandora.org/index.php/user/178-stuckie/ stuckie]
|
|Steven Campbell
|[https://twitter.com/stuckieGAMEZ]
|http://www.stuckiegamez.co.uk
|
|
|[http://www.youtube.com/user/stuckiegamez]
|
|
|-
|[http://boards.openpandora.org/index.php/user/775-sebt3/ Sebt3]
|
|Sebastien Huss
|
|http://sebt3.openpandora.org
|
|porting
|
|
|
|-
|[http://boards.openpandora.org/index.php/user/4605-ekianjo/ ekianjo]
|
|
|[https://twitter.com/PandoraLiveInfo]
|[http://www.pandoralive.info Pandoralive.info]
|
|blog Japan shop
|[http://www.youtube.com/user/ekianjo]
|
|
|
|-
|[http://boards.openpandora.org/index.php/user/141-link/ Link]
|
|
|[https://twitter.com/ithic]
|http://www.ithic.com/
|
|USA shop
|
|
|
|-
|[http://boards.openpandora.org/index.php/user/213-milkshake/ milkshake]
|
|
|
|
|
|repo
|
|
|[https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=X5HE7FCG967KG paypal]
|-
|[http://boards.openpandora.org/index.php/user/924-cloudef/ Cloudef]
|
|Jari Vetoniemi
|
|http://cloudef.eu/ https://github.com/Cloudef
|
|neon hardfp glhck
|[http://www.youtube.com/user/Cloudef]
|
|
|-
|[http://boards.openpandora.org/index.php/user/5-zodttd/ zodttd]
|
|
|[https://twitter.com/zodttd]
|http://www.zodttd.com/ http://github.com/zodttd
|
|
|[http://www.youtube.com/user/zodttd]
|
|[https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=HEL55NKPAKX5Q]
|-
|[http://boards.openpandora.org/index.php/user/3847-iprice/ iprice]
|
|
|
|
|
|dev
|[http://www.youtube.com/user/iprice]
|
|
|-
|[http://boards.openpandora.org/index.php/user/1035-linux-swat/ Linux-SWAT]
|
|
|
|http://pandorawiki.org/Software_projects/OS/Slackware
http://pandorawiki.org/Software_projects/OS/SOLEIL
|
|[http://pandorawiki.org/Software_projects/OS/Slackware SL4P] [http://pandorawiki.org/Software_projects/OS/SOLEIL SOLEIL]
|
|
|[http://pandorawiki.org/Software_projects/OS/Slackware#Helping_this_project paypal]
|-
|[http://boards.openpandora.org/index.php/user/114-mcobit/ mcobit]
|
|
|
|
|
|
|[http://www.youtube.com/user/mcobit]
|
|
|-
|[http://boards.openpandora.org/index.php/user/4191-ingoreis/ ingoreis]
|
|Ingo Reis
|
|
|
|tester
|[http://www.youtube.com/user/reisingo]
|
|
|-
|
|
|
|
|
|
|
|[http://www.youtube.com/user/IsoTkhs]
|
|
|-
|[http://boards.openpandora.org/index.php/user/559-exophase/ Exophase]
|
| no
|
|
|
|[[DraStic]]
|[http://www.youtube.com/user/Exophase]
|
|
|-
|[http://boards.openpandora.org/index.php/user/4382-wb/ _wb_]
|
|Jon Sneyers
|
|
|X
|[http://repo.openpandora.org/?page=detail&app=sysinfo.wb sysinfo] [http://repo.openpandora.org/?page=detail&app=piv.wb PIV] [http://repo.openpandora.org/?page=detail&app=nubnub.wb nubnub] [http://repo.openpandora.org/?page=detail&app=microbes.wb microbes] mod
|[http://www.youtube.com/user/jonsneyers]
|
|
|-
|[http://boards.openpandora.org/index.php/user/198-cpasjuste/ cpasjuste]
|
|David Carre
|
|
|
|pxml, pnd minimenu xda
|[http://www.youtube.com/user/cpasjuste]
|
|
|-
|[http://boards.openpandora.org/index.php/user/5182-ptitseb/ ptitSeb]
|
|
|
|https://github.com/ptitSeb
|
|lots of ports
|
|
|
|-
|[http://boards.openpandora.org/index.php/user/2326-comradekingu/ comradekingu]
|
|Allan Nordhøy
|
|
|
|wiki
|[http://www.youtube.com/user/cccpkingu]
|[https://flattr.com/profile/anotheragency]
|
|-
|[http://boards.openpandora.org/index.php/user/3255-lunixbochs/ lunixbochs]
|
|Ryan Hileman
|[https://twitter.com/lunixbochs]
|https://github.com/lunixbochs http://lunixbochs.deviantart.com/ http://bochs.info/
|X
|libGL[http://boards.openpandora.org/index.php/topic/11506-opengl-implementation-tldr-more-games/]
|[http://www.youtube.com/user/lunixbochs]
|
|
|-
|[http://boards.openpandora.org/index.php/user/3596-atc/ aTc]
|
|
|
|
|
|.Next [http://boards.openpandora.org/index.php/topic/8452-next-development/]
|
|
|
|-
|[http://boards.openpandora.org/index.php/user/34-pokeparadox/ PokeParadox]
|
|
|[https://twitter.com/pokeparadox]
|http://pirategames.co.uk/
|X
|
|[http://www.youtube.com/pirategamesvideos]
|
|
|-
|[http://boards.openpandora.org/index.php/user/83-wally/ Wally]
|
|
|
|
|X
|wiki
|
|
|
|-
|[http://boards.openpandora.org/index.php/user/1463-moxie/ Moxie]
|
|
|
|
|X
|Vintage electronics
|
|
|
|-
|[http://boards.openpandora.org/index.php/user/3032-binky/ Binky]
|
|
|
|
|X
|graphics
|
|
|
|-
|[http://boards.openpandora.org/index.php/user/522-trashymg/ TrashyMG]
|
|Roy Gillotti
|
|
|X
|
|
|
|
|-
|[http://boards.openpandora.org/index.php/user/282-b-zar/ B-ZaR]
|
|
|[https://identi.ca/bzar]
|http://bzar.fi/ https://github.com/bzar
|
|panorama cli package manager
|[http://www.youtube.com/user/BZaRDev]
|
|
|-
|[http://boards.openpandora.org/index.php/user/28-gadgetoid/ Gadgetoid]
|
|Phil Howard
|[https://twitter.com/Gadgetoid]
|http://www.gadgetoid.com/ https://github.com/Gadgetoid
|X
|technews rpi
|[http://www.youtube.com/user/GadgetoidUK]
|
|
|-
|[http://boards.openpandora.org/index.php/user/519-double7/ double7]
|
|
|
|
|
|german wiki admin
|
|
|
|-
|[http://boards.openpandora.org/index.php/user/7597-lolla/ Lolla]
|
|
|
|
|
|happiness
|
|
|
|-
|[http://boards.openpandora.org/user/379-farox/ Farox]
|
|Fabrizio
|
|http://farox.rbnet.it/
|
|blog
|[http://www.youtube.com/user/Farox68]
|
|[https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=K2V6DH3SGMFV4 paypal]
|-
|[http://boards.openpandora.org/user/8460-vinipsmaker/ vinipsmaker]
|
|Vinícius dos Santos Oliveira
|
|https://github.com/vinipsmaker http://vinipsmaker.wordpress.com/category/en/
|
|constructive feedback pixeltrickery
|[http://www.youtube.com/user/vinipsmaker]
|
|
|}

[http://boards.openpandora.org/index.php?app=forums&module=extras&section=stats&do=leaders The Moderating team]

Maybe add field for social networking site, like facebook and g+, country? With semantic lists we can do coordinates

B-zar, gruso, bobbens, superroach, SONY, sswam, wally, moxie, and lots of others, been doing the ones i can find
youtube links to thus far.
ED headquarters

{{#display_map: 48.7665352, 11.4257540 | zoom=3 | service=openlayers| layers=osm-mapnik, osm-cyclemap, osmarender}}
old info in discussion

https://twitter.com/David994A

[[Category:Community]]

Talk:Power modes

2012-11-15T14:32:14Z

Jonsneyers: /* hard shutdown */

"10-20% per day charge loss (est)" - mine does not discharge nearly this much on it's own while powered off for a day. --[[User:Cheese|Cheese]] 07:13, 26 June 2010 (MEST)

That was borrowed from some forum chat, it would be good to collect some numbers (see table below), both for going through a power cycle (chews battery on my phone) and powering up after 12/24/48 hours off. I also wonder if some batteries are more leaky than others. 50% loss over a weekend was (i think) quoted.--[[User:Tsh|Tsh]] 19:43, 26 June 2010 (MEST)

==Self-discharge==
Off 13 hours = 100% -> 99%. (tsh) 
Off 18 hours = 97% -> 97% (cheese) 
Off 13 hours = 39% -> 44% (Ivanovic, FS#136)

Based on this, maybe taking a reading immediately after power on is not reliable, so I now suggest taking 2 readings, one immediately after power on, one 15 min later (after sitting idle) --[[User:Tsh|Tsh]] 12:48, 5 July 2010 (MEST)

The total battery drain over the course of one week and one day, with a few minutes of usage on two occasions, was 6%. [http://boards.openpandora.org/index.php?/topic/24-battery-drain/page__view__findpost__p__6088]

==Charge times==
Low power 1:36 17%->51% (->63% after 3 min not charging)(tsh)

==Low power==
"the CPU max speed is set to 14 MHz"

Is it still true ?--[[User:Linux-SWAT|Linux-SWAT]] 00:37, 27 May 2011 (MEST)

== All off (as low power state) ==

With WiFi off, screen off (Hotfix 3)

500 MHz 4h10m 81%->63% (~23 hours battery life) 
50 MHz 4 hours, 62% -> 45% (same as above)

Hotfix 4
250 MHz, opp1 2:55, 10% (30 hours)

== MP3 only ==

500 MHz 63 min, 6% (17.5 hours)-exaile 
500 MHz 2:54, 16% (18 hours) - ommpc 
500 MHz opp5 1:15, 7% (18 hours) - deadbeef 
900 MHz opp5 2:30, 15% (18 hours) - deadbeef 
250 MHz oop1 2:30, 15% (18 hours) - deadbeef 

== Release SuperZaxxon, Beta 2, Kernel 3.2.1 ==

[http://boards.openpandora.org/index.php?/topic/7196-32-kernel-issue-tracking-thread/page__st__200#entry138048 Study by porg] -- [[User:Porg|Porg]] 23:14, 8 April 2012 (CEST)

== hard shutdown ==

: To do a '''hard-shutdown''' of the Pandora, press and hold the Pandora key ''with right shoulder button held'' and flick the power button to the right, and then select shutdown from the menu.[http://www.gp32x.com/board/index.php?/topic/59233-hf5-not-shutting-down-or-rebooting/page__view__findpost__p__946375]

This isn't true for me. It just reboots. — [[Image:Spiralofhope-logo-016.png]] [[User:Spiralofhope|spiralofhope]] / [[User_Talk:Spiralofhope|(talk)]] 22:57, 9 May 2012 (CEST)

You have to keep the right shoulder button down, so when it reboots, it shows the boot menu. Then from the boot menu you can select shutdown.

Power modes

2012-11-15T14:29:39Z

Jonsneyers: /* Times */

[[Image:Battery.jpg|thumb|The Pandora's battery]]

==Power Modes==

Without switching the device entirely off, it may be placed into low power mode or regular power mode; simply pressing the power button will toggle modes. Note that as of [[hotfix3]], opening the lid in low power mode has no effect.

===Normal Mode===
This is the normal operating mode, [[display]] on, [[WiFi]] and [[Bluetooth]] on if requested. [[CPU speed]] can be selected by the user, and has a small impact on battery life. Screen brightness will also have a significant effect on battery life. The CPU should automatically self-regulate to the current task, and 10-20 hours [[battery]] life is possible depending on usage. This is mostly independent of the set CPU speed for any given task. At any time, the battery gauge will show the remaining battery life ''if the usage remains the same as over the past some seconds''.
See [http://boards.openpandora.org/index.php?/topic/10738-pandora-power-consumption-breakdown/] for a detailed breakdown of power consumption.

===Lid Closed===
The only change with the lid closed is to turn off the LCD [[backlight]] and the display itself. This improves battery life, allowing music playback and streaming to continue. As of [[Hotfix2]], the screen remains on if the device is powered up with the lid closed. It is also possible to set [[xfce]] to blank the screen after a period of inactivity, which helps with battery.

===Low Power===
Low power mode is toggled by a short press of the [[power switch]] to the right. The screen is off, the [[radios]] are disabled, the CPU max speed is set to 14 MHz. The device is still silently on, allowing for alarms to go off or it to be turned on again instantly. The power [[LED]] will be dimmed, and may appear to be off if you are outside.

Low power mode is probably going to be used as the normal "off" for most people, with true off (device powered down entirely, unable to respond to alarms or wake up quickly) available to conserve battery power. Turning the Pandora off completely is the best option if you don't plan on using it for few days or longer.

Since the Pandora has to be powered whilst it is charging, low power mode is best for fastest charging, and will even allow a full charge to be achieved from [[USB]]. It is also the best way to use the Pandora as a [[USB]] charger for other devices.

Opening the [[screen]] whilst in low power mode has no effect (screen stays off, clocks stay low), and you will need to use the power switch to resume.

At the moment, there is no clear advantage in slowing the clocks (other than being an effective pause button when playing MP3). The only saving is through disabling the radios. This is likely to be improved in due course since there are features in the omap processor for power saving which are being added to the linux [[kernel]].

===Power Off===
Select Logout then Shutdown from the window manager to power off. If a charger is connected, the device will re-boot immediately. It is possible to get into a state where you believe it is powered off, but in fact it is using power at the normal screen off rate - so after 12 hours, 50% of your battery is gone. The Power green [[LED]] ought to be a tell-tale. It is possible that some bugs exist in this area, but nothing has been clearly identified[http://www.gp32x.com/board/index.php?/topic/54652-solved-pandora-lost-charge-overnight/]

A common problem seems to be that if you switch off ''before'' unplugging, your Pandora will re-boot even though it is now left unplugged. This problem is compounded by the low battery shutdown script being called repeatedly (and actually preventing shutdown).

To do a '''hard-reset''' of the Pandora (in case of software crashes), press and hold the [[Pandora key]] and flick the power button to the right.

To do a '''hard-shutdown''' of the Pandora, press and hold the Pandora key ''with right shoulder button held'' and flick the power button to the right, and then select shutdown from the menu.[http://www.gp32x.com/board/index.php?/topic/59233-hf5-not-shutting-down-or-rebooting/page__view__findpost__p__946375]

==Events==
The events which control power can be customised [http://www.gp32x.com/board/index.php?/topic/54544-forcing-shutdown-at-10-battery-life/page__view__findpost__p__878418]. Lid switch, Power Switch, battery threshold and Window Manager shutdown commands. Note that the battery manager in xfce will also take action when the battery is low, by default forcing a shutdown at 5% (so you may observe a full boot process, the window manager appears, then immediately shuts down)

==Charging==
[[image:Power_uk.png|thumb|alt=UK charger and adapter|UK charger and adapter]]
It is possible to charge from the mains charger (use the supplied one or a ''GENUINE'' PSP adaptor only) or [[USB]] cable. While a charger is connected, remaining [[battery]] level is displayed, but the time displays 00:00. If charging from USB, it is possible that the battery will still discharge slowly, since the Pandora takes more current (in normal mode) than the USB can supply. Mains charge is configured to draw 2000mA, USB charge is more like 500mA.

It is not possible to charge the Pandora without turning it on - connecting the mains charger or the USB cable will turn it on automatically. The normal charging circuits rely on the CPU for configuration. In practice, this has minimal impact on usage, except that after charging,

you might wish to explicitly turn off (and maybe there is a easy way to automate this by adding a charger event to call a script).

Full discharge charging: The pandora will shutdown in case of low battery power. However there is a protection circuit in the battery itself which will cut off the power output of the battery. The battery and the pandora seems to be dead in this condition, but it's not. If you plug in the power

you'll see nothing happen - but the battery will be recharged very slowly until the battery is above it's cutoff level. This could take up to 30 minutes. Then the pandora will startup and the normal CPU controlled faster charging will continue.
[http://boards.openpandora.org/index.php?/topic/8426-battery-completely-dead/#entry150209]


If your Pandora's [[battery]] is at less than 1% (actually configurable in [[XFCE]]), then you may have problems in using [[USB]] to charge the Pandora. Currently, [[USB]] is not recognised by the [[XFCE]] battery monitor so it will shutdown with no warning. As a workaround, you can put your Pandora into low power mode as soon as the flashing mouse icon (XFE startup) appears. This should significantly delay loading the battery monitor widget, and even if the charge hasn't passed 1% by the time it checks, on the next try you should be there.

==Operating Point==
The ''OPP'' is a TI term which reflects the fact that low clock speeds can be achieved with lower supply voltage than the higher clock speeds. Increasing OPP will reduce the lifetime of the device significantly (from 10 years to 5 years of continuous use.) OPP3 is the default as shipped by OpenPandora. As of Hotfix4, it is possible to set a maximum OPP in the range 1-5 (for example, to 5):
<source lang="bash">echo 5 | sudo tee -a /proc/pandora/cpu_opp_max</source>
This will then increase OPP to suit the requested CPU max, as pre-determined by a table built in to the kernel. These thresholds use OPP1 for below 125 MHz, and OPP5 for above 720 MHz. It is possible to set the limiter and maybe run at 500 MHz in OPP2 (depending on your specific chip). See [http://boards.openpandora.org/index.php?/topic/22-using-hotfix4-how-high-can-you-clock/ this forum thread] for actual results.

{{warning
|Using anything above OPP3 WILL shorten the lifetime of your Pandora, although it should still outlive the 1 year warranty. Using anything above OPP5 and 1Ghz will void your warranty (see [[Overclocking#Warranty_information|here]])
}}

Tweaking scripts to make this tuning easier are in the works.

==Monitoring==
The [[kernel]] provides some information about battery state through the filesystem. See [[Data_provided_by_Battery_and_Power_driver]]. This may help with diagnosing problems.

==Times==
* This data originates from different studies performed under different OS versions and use cases.
* Please add the source and a short note about the conditions you used, and if necessary more detailed ones to the Talk page. You can use [http://repo.openpandora.org/?page=detail&app=sysinfo.wb Pandora System Info] to monitor power consumption.
{| class="wikitable"
!Mode
!Time
!Details, Source
|-
! Active applications/games
| 8-18 hours
| SZ 1.52
|-
! Low load, low backlight brightness
| 20-25 hours
| SZ 1.52
|-
! Drain the battery as fast as possible
| 4 hours
| SZ 1.52, backlight at max brightness, constant wifi activity (big download), CPU stress test running at OPP5 and overclocking above 900 MHz, copying huge files from one SD card to the other, USB host and bluetooth activated (but nothing connected)
|-
! MP3 play, screen off
| 43 hours
| MP3 playback in [http://repo.openpandora.org/?page=detail&app=audacious Audacious] in [http://boards.openpandora.org/index.php?/topic/7196-32-kernel-issue-tracking-thread/page__st__200#entry138048 OS SuperZaxxon, Beta 2, Kernel 3.2.1]
|
|-
! Low Power Mode
|30-75 hours
| [http://boards.openpandora.org/index.php?/topic/7196-32-kernel-issue-tracking-thread/page__st__200#entry138048 OS SuperZaxxon, Beta 2, Kernel 3.2.1]
|-
! Standby Mode
| 160-200 hours
| [http://boards.openpandora.org/index.php?/topic/7196-32-kernel-issue-tracking-thread/page__st__200#entry138048 OS SuperZaxxon, Beta 2, Kernel 3.2.1]
|-
! Power off
|5% charge loss per week
| although there are reports of much faster drain?[http://boards.openpandora.org/index.php?/topic/24-battery-drain/]
|-
! Mains charge, lid closed
| 4 hours
| SuperZaxxon 1.52
|-
! USB Charge, operating
| 20 hours
| inactive, screen+wifi on, may charge or discharge depending on load
|-
! USB Charge, low power
|20 hours
|estimate
|}

==Battery Care==
* You can charge your [[battery]] to full charge, the charging circuits will then reduce the current to avoid overheating
* If you won't use the [[battery]] for more than a week, it is best to leave it at about 40% charged (as opposed to full)
* Don't worry about running it down too low, there are protection circuits to avoid a '''damagingly low discharge'''.
**Avoid leaving the battery completely discharged though. When the power runs out, the system will be unable to shutdown cleanly, and might corrupt your files or the system.
* No harm will come if you only partially recharge it. If you've only got 10 free minutes to charge before leaving, go ahead. You'll put an hour of usage back into the battery, and you can always charge it more later.
* For best accuracy, the battery meter relies on watching the battery discharge over most of it's range (down to say 10%).
**This will only affect the 'time to run' indication
* If you're not going to be using your battery for a very long time, the extremely best thing you can do for it is to discharge to 40%, seal it in an airtight bag, and put it in the fridge. Even years later, you pull it out, and it will be almost as good as when you put it in.

[[Category:Power supply]]

Power modes

2012-11-15T14:15:18Z

Jonsneyers: /* Lid Closed */

[[Image:Battery.jpg|thumb|The Pandora's battery]]

==Power Modes==

Without switching the device entirely off, it may be placed into low power mode or regular power mode; simply pressing the power button will toggle modes. Note that as of [[hotfix3]], opening the lid in low power mode has no effect.

===Normal Mode===
This is the normal operating mode, [[display]] on, [[WiFi]] and [[Bluetooth]] on if requested. [[CPU speed]] can be selected by the user, and has a small impact on battery life. Screen brightness will also have a significant effect on battery life. The CPU should automatically self-regulate to the current task, and 10-20 hours [[battery]] life is possible depending on usage. This is mostly independent of the set CPU speed for any given task. At any time, the battery gauge will show the remaining battery life ''if the usage remains the same as over the past some seconds''.
See [http://boards.openpandora.org/index.php?/topic/10738-pandora-power-consumption-breakdown/] for a detailed breakdown of power consumption.

===Lid Closed===
The only change with the lid closed is to turn off the LCD [[backlight]] and the display itself. This improves battery life, allowing music playback and streaming to continue. As of [[Hotfix2]], the screen remains on if the device is powered up with the lid closed. It is also possible to set [[xfce]] to blank the screen after a period of inactivity, which helps with battery.

===Low Power===
Low power mode is toggled by a short press of the [[power switch]] to the right. The screen is off, the [[radios]] are disabled, the CPU max speed is set to 14 MHz. The device is still silently on, allowing for alarms to go off or it to be turned on again instantly. The power [[LED]] will be dimmed, and may appear to be off if you are outside.

Low power mode is probably going to be used as the normal "off" for most people, with true off (device powered down entirely, unable to respond to alarms or wake up quickly) available to conserve battery power. Turning the Pandora off completely is the best option if you don't plan on using it for few days or longer.

Since the Pandora has to be powered whilst it is charging, low power mode is best for fastest charging, and will even allow a full charge to be achieved from [[USB]]. It is also the best way to use the Pandora as a [[USB]] charger for other devices.

Opening the [[screen]] whilst in low power mode has no effect (screen stays off, clocks stay low), and you will need to use the power switch to resume.

At the moment, there is no clear advantage in slowing the clocks (other than being an effective pause button when playing MP3). The only saving is through disabling the radios. This is likely to be improved in due course since there are features in the omap processor for power saving which are being added to the linux [[kernel]].

===Power Off===
Select Logout then Shutdown from the window manager to power off. If a charger is connected, the device will re-boot immediately. It is possible to get into a state where you believe it is powered off, but in fact it is using power at the normal screen off rate - so after 12 hours, 50% of your battery is gone. The Power green [[LED]] ought to be a tell-tale. It is possible that some bugs exist in this area, but nothing has been clearly identified[http://www.gp32x.com/board/index.php?/topic/54652-solved-pandora-lost-charge-overnight/]

A common problem seems to be that if you switch off ''before'' unplugging, your Pandora will re-boot even though it is now left unplugged. This problem is compounded by the low battery shutdown script being called repeatedly (and actually preventing shutdown).

To do a '''hard-reset''' of the Pandora (in case of software crashes), press and hold the [[Pandora key]] and flick the power button to the right.

To do a '''hard-shutdown''' of the Pandora, press and hold the Pandora key ''with right shoulder button held'' and flick the power button to the right, and then select shutdown from the menu.[http://www.gp32x.com/board/index.php?/topic/59233-hf5-not-shutting-down-or-rebooting/page__view__findpost__p__946375]

==Events==
The events which control power can be customised [http://www.gp32x.com/board/index.php?/topic/54544-forcing-shutdown-at-10-battery-life/page__view__findpost__p__878418]. Lid switch, Power Switch, battery threshold and Window Manager shutdown commands. Note that the battery manager in xfce will also take action when the battery is low, by default forcing a shutdown at 5% (so you may observe a full boot process, the window manager appears, then immediately shuts down)

==Charging==
[[image:Power_uk.png|thumb|alt=UK charger and adapter|UK charger and adapter]]
It is possible to charge from the mains charger (use the supplied one or a ''GENUINE'' PSP adaptor only) or [[USB]] cable. While a charger is connected, remaining [[battery]] level is displayed, but the time displays 00:00. If charging from USB, it is possible that the battery will still discharge slowly, since the Pandora takes more current (in normal mode) than the USB can supply. Mains charge is configured to draw 2000mA, USB charge is more like 500mA.

It is not possible to charge the Pandora without turning it on - connecting the mains charger or the USB cable will turn it on automatically. The normal charging circuits rely on the CPU for configuration. In practice, this has minimal impact on usage, except that after charging,

you might wish to explicitly turn off (and maybe there is a easy way to automate this by adding a charger event to call a script).

Full discharge charging: The pandora will shutdown in case of low battery power. However there is a protection circuit in the battery itself which will cut off the power output of the battery. The battery and the pandora seems to be dead in this condition, but it's not. If you plug in the power

you'll see nothing happen - but the battery will be recharged very slowly until the battery is above it's cutoff level. This could take up to 30 minutes. Then the pandora will startup and the normal CPU controlled faster charging will continue.
[http://boards.openpandora.org/index.php?/topic/8426-battery-completely-dead/#entry150209]


If your Pandora's [[battery]] is at less than 1% (actually configurable in [[XFCE]]), then you may have problems in using [[USB]] to charge the Pandora. Currently, [[USB]] is not recognised by the [[XFCE]] battery monitor so it will shutdown with no warning. As a workaround, you can put your Pandora into low power mode as soon as the flashing mouse icon (XFE startup) appears. This should significantly delay loading the battery monitor widget, and even if the charge hasn't passed 1% by the time it checks, on the next try you should be there.

==Operating Point==
The ''OPP'' is a TI term which reflects the fact that low clock speeds can be achieved with lower supply voltage than the higher clock speeds. Increasing OPP will reduce the lifetime of the device significantly (from 10 years to 5 years of continuous use.) OPP3 is the default as shipped by OpenPandora. As of Hotfix4, it is possible to set a maximum OPP in the range 1-5 (for example, to 5):
<source lang="bash">echo 5 | sudo tee -a /proc/pandora/cpu_opp_max</source>
This will then increase OPP to suit the requested CPU max, as pre-determined by a table built in to the kernel. These thresholds use OPP1 for below 125 MHz, and OPP5 for above 720 MHz. It is possible to set the limiter and maybe run at 500 MHz in OPP2 (depending on your specific chip). See [http://boards.openpandora.org/index.php?/topic/22-using-hotfix4-how-high-can-you-clock/ this forum thread] for actual results.

{{warning
|Using anything above OPP3 WILL shorten the lifetime of your Pandora, although it should still outlive the 1 year warranty. Using anything above OPP5 and 1Ghz will void your warranty (see [[Overclocking#Warranty_information|here]])
}}

Tweaking scripts to make this tuning easier are in the works.

==Monitoring==
The [[kernel]] provides some information about battery state through the filesystem. See [[Data_provided_by_Battery_and_Power_driver]]. This may help with diagnosing problems.

==Times==
* This data originates from different studies performed under different OS versions and use cases.
* Please add the source and a short note about the conditions you used, and if necessary more detailed ones to the Talk page.
{| class="wikitable"
!Mode
!Time
!Details, Source
|-
! Active PND applications
| 10-20 hours
| OS SuperZaxxon, Beta 2, Kernel 3.2.1
|-
! MP3 play, screen off
| 43 hours
| MP3 playback in [http://repo.openpandora.org/?page=detail&app=audacious Audacious] in [http://boards.openpandora.org/index.php?/topic/7196-32-kernel-issue-tracking-thread/page__st__200#entry138048 OS SuperZaxxon, Beta 2, Kernel 3.2.1]
|
|-
! Low Power Mode
|30-75 hours
| [http://boards.openpandora.org/index.php?/topic/7196-32-kernel-issue-tracking-thread/page__st__200#entry138048 OS SuperZaxxon, Beta 2, Kernel 3.2.1]
|-
! Standby Mode
| 160-200 hours
| [http://boards.openpandora.org/index.php?/topic/7196-32-kernel-issue-tracking-thread/page__st__200#entry138048 OS SuperZaxxon, Beta 2, Kernel 3.2.1]
|-
! Power off
|5% charge loss per week
| although there are reports of much faster drain?[http://boards.openpandora.org/index.php?/topic/24-battery-drain/]
|-
! Mains charge, operating
| 20 hours
| estimate, OS Zaxxon, Hotfix 3
|-
! Mains charge (low power)
|8 hours
| estimate, OS Zaxxon, Hotfix 3
|-
! USB Charge, operating
| 20 hours
| inactive, screen+wifi on, may charge or discharge depending on load
|-
! USB Charge, low power
|20 hours
|estimate
|}

==Battery Care==
* You can charge your [[battery]] to full charge, the charging circuits will then reduce the current to avoid overheating
* If you won't use the [[battery]] for more than a week, it is best to leave it at about 40% charged (as opposed to full)
* Don't worry about running it down too low, there are protection circuits to avoid a '''damagingly low discharge'''.
**Avoid leaving the battery completely discharged though. When the power runs out, the system will be unable to shutdown cleanly, and might corrupt your files or the system.
* No harm will come if you only partially recharge it. If you've only got 10 free minutes to charge before leaving, go ahead. You'll put an hour of usage back into the battery, and you can always charge it more later.
* For best accuracy, the battery meter relies on watching the battery discharge over most of it's range (down to say 10%).
**This will only affect the 'time to run' indication
* If you're not going to be using your battery for a very long time, the extremely best thing you can do for it is to discharge to 40%, seal it in an airtight bag, and put it in the fridge. Even years later, you pull it out, and it will be almost as good as when you put it in.

[[Category:Power supply]]

Power modes

2012-11-15T14:13:24Z

Jonsneyers: /* Normal Mode */

[[Image:Battery.jpg|thumb|The Pandora's battery]]

==Power Modes==

Without switching the device entirely off, it may be placed into low power mode or regular power mode; simply pressing the power button will toggle modes. Note that as of [[hotfix3]], opening the lid in low power mode has no effect.

===Normal Mode===
This is the normal operating mode, [[display]] on, [[WiFi]] and [[Bluetooth]] on if requested. [[CPU speed]] can be selected by the user, and has a small impact on battery life. Screen brightness will also have a significant effect on battery life. The CPU should automatically self-regulate to the current task, and 10-20 hours [[battery]] life is possible depending on usage. This is mostly independent of the set CPU speed for any given task. At any time, the battery gauge will show the remaining battery life ''if the usage remains the same as over the past some seconds''.
See [http://boards.openpandora.org/index.php?/topic/10738-pandora-power-consumption-breakdown/] for a detailed breakdown of power consumption.

===Lid Closed===
The only change with the lid closed is to turn off the LCD [[backlight]]. This improves battery life, allowing music playback and streaming to continue. As of [[Hotfix2]], the screen remains on if the device is powered up with the screen closed. It is also possible to set [[xfce]] to blank the screen after a period of inactivity, which helps with battery.

===Low Power===
Low power mode is toggled by a short press of the [[power switch]] to the right. The screen is off, the [[radios]] are disabled, the CPU max speed is set to 14 MHz. The device is still silently on, allowing for alarms to go off or it to be turned on again instantly. The power [[LED]] will be dimmed, and may appear to be off if you are outside.

Low power mode is probably going to be used as the normal "off" for most people, with true off (device powered down entirely, unable to respond to alarms or wake up quickly) available to conserve battery power. Turning the Pandora off completely is the best option if you don't plan on using it for few days or longer.

Since the Pandora has to be powered whilst it is charging, low power mode is best for fastest charging, and will even allow a full charge to be achieved from [[USB]]. It is also the best way to use the Pandora as a [[USB]] charger for other devices.

Opening the [[screen]] whilst in low power mode has no effect (screen stays off, clocks stay low), and you will need to use the power switch to resume.

At the moment, there is no clear advantage in slowing the clocks (other than being an effective pause button when playing MP3). The only saving is through disabling the radios. This is likely to be improved in due course since there are features in the omap processor for power saving which are being added to the linux [[kernel]].

===Power Off===
Select Logout then Shutdown from the window manager to power off. If a charger is connected, the device will re-boot immediately. It is possible to get into a state where you believe it is powered off, but in fact it is using power at the normal screen off rate - so after 12 hours, 50% of your battery is gone. The Power green [[LED]] ought to be a tell-tale. It is possible that some bugs exist in this area, but nothing has been clearly identified[http://www.gp32x.com/board/index.php?/topic/54652-solved-pandora-lost-charge-overnight/]

A common problem seems to be that if you switch off ''before'' unplugging, your Pandora will re-boot even though it is now left unplugged. This problem is compounded by the low battery shutdown script being called repeatedly (and actually preventing shutdown).

To do a '''hard-reset''' of the Pandora (in case of software crashes), press and hold the [[Pandora key]] and flick the power button to the right.

To do a '''hard-shutdown''' of the Pandora, press and hold the Pandora key ''with right shoulder button held'' and flick the power button to the right, and then select shutdown from the menu.[http://www.gp32x.com/board/index.php?/topic/59233-hf5-not-shutting-down-or-rebooting/page__view__findpost__p__946375]

==Events==
The events which control power can be customised [http://www.gp32x.com/board/index.php?/topic/54544-forcing-shutdown-at-10-battery-life/page__view__findpost__p__878418]. Lid switch, Power Switch, battery threshold and Window Manager shutdown commands. Note that the battery manager in xfce will also take action when the battery is low, by default forcing a shutdown at 5% (so you may observe a full boot process, the window manager appears, then immediately shuts down)

==Charging==
[[image:Power_uk.png|thumb|alt=UK charger and adapter|UK charger and adapter]]
It is possible to charge from the mains charger (use the supplied one or a ''GENUINE'' PSP adaptor only) or [[USB]] cable. While a charger is connected, remaining [[battery]] level is displayed, but the time displays 00:00. If charging from USB, it is possible that the battery will still discharge slowly, since the Pandora takes more current (in normal mode) than the USB can supply. Mains charge is configured to draw 2000mA, USB charge is more like 500mA.

It is not possible to charge the Pandora without turning it on - connecting the mains charger or the USB cable will turn it on automatically. The normal charging circuits rely on the CPU for configuration. In practice, this has minimal impact on usage, except that after charging,

you might wish to explicitly turn off (and maybe there is a easy way to automate this by adding a charger event to call a script).

Full discharge charging: The pandora will shutdown in case of low battery power. However there is a protection circuit in the battery itself which will cut off the power output of the battery. The battery and the pandora seems to be dead in this condition, but it's not. If you plug in the power

you'll see nothing happen - but the battery will be recharged very slowly until the battery is above it's cutoff level. This could take up to 30 minutes. Then the pandora will startup and the normal CPU controlled faster charging will continue.
[http://boards.openpandora.org/index.php?/topic/8426-battery-completely-dead/#entry150209]


If your Pandora's [[battery]] is at less than 1% (actually configurable in [[XFCE]]), then you may have problems in using [[USB]] to charge the Pandora. Currently, [[USB]] is not recognised by the [[XFCE]] battery monitor so it will shutdown with no warning. As a workaround, you can put your Pandora into low power mode as soon as the flashing mouse icon (XFE startup) appears. This should significantly delay loading the battery monitor widget, and even if the charge hasn't passed 1% by the time it checks, on the next try you should be there.

==Operating Point==
The ''OPP'' is a TI term which reflects the fact that low clock speeds can be achieved with lower supply voltage than the higher clock speeds. Increasing OPP will reduce the lifetime of the device significantly (from 10 years to 5 years of continuous use.) OPP3 is the default as shipped by OpenPandora. As of Hotfix4, it is possible to set a maximum OPP in the range 1-5 (for example, to 5):
<source lang="bash">echo 5 | sudo tee -a /proc/pandora/cpu_opp_max</source>
This will then increase OPP to suit the requested CPU max, as pre-determined by a table built in to the kernel. These thresholds use OPP1 for below 125 MHz, and OPP5 for above 720 MHz. It is possible to set the limiter and maybe run at 500 MHz in OPP2 (depending on your specific chip). See [http://boards.openpandora.org/index.php?/topic/22-using-hotfix4-how-high-can-you-clock/ this forum thread] for actual results.

{{warning
|Using anything above OPP3 WILL shorten the lifetime of your Pandora, although it should still outlive the 1 year warranty. Using anything above OPP5 and 1Ghz will void your warranty (see [[Overclocking#Warranty_information|here]])
}}

Tweaking scripts to make this tuning easier are in the works.

==Monitoring==
The [[kernel]] provides some information about battery state through the filesystem. See [[Data_provided_by_Battery_and_Power_driver]]. This may help with diagnosing problems.

==Times==
* This data originates from different studies performed under different OS versions and use cases.
* Please add the source and a short note about the conditions you used, and if necessary more detailed ones to the Talk page.
{| class="wikitable"
!Mode
!Time
!Details, Source
|-
! Active PND applications
| 10-20 hours
| OS SuperZaxxon, Beta 2, Kernel 3.2.1
|-
! MP3 play, screen off
| 43 hours
| MP3 playback in [http://repo.openpandora.org/?page=detail&app=audacious Audacious] in [http://boards.openpandora.org/index.php?/topic/7196-32-kernel-issue-tracking-thread/page__st__200#entry138048 OS SuperZaxxon, Beta 2, Kernel 3.2.1]
|
|-
! Low Power Mode
|30-75 hours
| [http://boards.openpandora.org/index.php?/topic/7196-32-kernel-issue-tracking-thread/page__st__200#entry138048 OS SuperZaxxon, Beta 2, Kernel 3.2.1]
|-
! Standby Mode
| 160-200 hours
| [http://boards.openpandora.org/index.php?/topic/7196-32-kernel-issue-tracking-thread/page__st__200#entry138048 OS SuperZaxxon, Beta 2, Kernel 3.2.1]
|-
! Power off
|5% charge loss per week
| although there are reports of much faster drain?[http://boards.openpandora.org/index.php?/topic/24-battery-drain/]
|-
! Mains charge, operating
| 20 hours
| estimate, OS Zaxxon, Hotfix 3
|-
! Mains charge (low power)
|8 hours
| estimate, OS Zaxxon, Hotfix 3
|-
! USB Charge, operating
| 20 hours
| inactive, screen+wifi on, may charge or discharge depending on load
|-
! USB Charge, low power
|20 hours
|estimate
|}

==Battery Care==
* You can charge your [[battery]] to full charge, the charging circuits will then reduce the current to avoid overheating
* If you won't use the [[battery]] for more than a week, it is best to leave it at about 40% charged (as opposed to full)
* Don't worry about running it down too low, there are protection circuits to avoid a '''damagingly low discharge'''.
**Avoid leaving the battery completely discharged though. When the power runs out, the system will be unable to shutdown cleanly, and might corrupt your files or the system.
* No harm will come if you only partially recharge it. If you've only got 10 free minutes to charge before leaving, go ahead. You'll put an hour of usage back into the battery, and you can always charge it more later.
* For best accuracy, the battery meter relies on watching the battery discharge over most of it's range (down to say 10%).
**This will only affect the 'time to run' indication
* If you're not going to be using your battery for a very long time, the extremely best thing you can do for it is to discharge to 40%, seal it in an airtight bag, and put it in the fridge. Even years later, you pull it out, and it will be almost as good as when you put it in.

[[Category:Power supply]]

Pandora

2012-11-15T14:10:34Z

Jonsneyers: /* Power */

{{disclaimer}}
{{help}}

[[Image:PandoraFrontNew.jpg|right|thumb|320px|The Pandora.]]
__TOC__

= Overview =

The Pandora is a unique combination of gaming console and pocket computer.

It is the [[Wikipedia:spiritual successor|spiritual successor]] to other handheld consoles such as the [[Wikipedia:GP32|GP32]] and [[Wikipedia:GP2X|GP2X]]. There is currently no other device that has dedicated gaming controls, two [[nubs|analog nubs]] and a [[keyboard|QWERTY keyboard]].

It was developed as a gaming device not just to run [[games]] made just for it but also to [[Emulator list|emulate older systems]]. From home consoles like the [[Wikipedia:Atari 2600|Atari 2600]], [[Wikipedia:Nintendo Entertainment System|NES]], [[Wikipedia:Super Nintendo Entertainment System|SNES]], [[Wikipedia:Sega Master System|Sega Master System]], [[Wikipedia:Sega Genesis|Sega Genesis]] and [[Wikipedia:Neo Geo (system)|Neo Geo]] to handheld consoles like the [[Wikipedia:Sega Game Gear|Game Gear]], [[Wikipedia:Game Boy|Game Boy]]/[[Wikipedia:Game Boy Color|Color]]/[[Wikipedia:Game Boy Advance|Advance]] to traditional arcade cabinet games. It can also emulate entire computer systems, from the [[Wikipedia:Commodore 64|Commodore 64]] and [[Wikipedia:Amiga|Amiga]] to old Apple Macintosh computers or a PC with DOS.

The Pandora can do all of this because it is a tiny computer running a custom distribution of Linux based on [http://www.angstrom-distribution.org/ The Ångström Distribution]. Because it runs Linux, the Pandora isn't just a console but a complete desktop computer with access to tens of thousands of Linux programs.

From classic gaming, listening to music, watching movies, viewing pictures, program development or surfing the web to just reading or writing texts, the Pandora has a lot to offer.

{{hr}}

[[FAQ|Our FAQ]] has more detailed information.

[http://www.open-pandora.org/index.php?option=com_content&view=article&id=97&Itemid=34&lang=en Visit the Pandora website] for ordering information.

= Specifications =

[[Hardware documentation]] has detailed hardware specifications.

* [[Size Comparisons|140 x 83 x 27 mm]]

* 320g (0.739 lbs) {{FIXME|Does this include the battery?}}

== Core Hardware ==

* [[Hardware_documentation#OMAP3530|Texas Instruments OMAP3530 SoC]]

* [[Hardware_documentation#PowerVR|PowerVR SGX GPU]]

* 512MB DDR SDRAM.

* 512MB internal storage ([[NAND]])

== Display ==

* Touchscreen TFT-LCD
** 4.3-inch (93.6 x 56.2 mm)
** 800x480 widescreen (5:3)
** Brightness: 300 cd/m2
** Contrast ratio: 450:1
*** Viewable in direct sunlight, but it ''will'' wash out.
** Response time: tr+tf=30ms
*** No ghosting.

* {{FIXME|This is a mess.}} TV-out included in hardware, A/V-OUT Port (similar in appearance to a large USB OTG port) has Composite and S-Video outputs and 3.5mm headphone output and microphone input.
** Separate TV-out signals, picture-in-picture capabilities. [http://www.gp32x.com/board/index.php?showtopic=38044]

== Audio ==

* Stereo speakers

* Volume control wheel

* Microphone

* A [[Wikipedia:Digital-to-analog converter|DAC]] and an [[Wikipedia:Analog-to-digital converter|ADC]]

== Input ==

* QWERTY [[keyboard]]

* Gaming controls:
** 8-way D-pad
** Four gaming buttons
** Two shoulder buttons
** Two analog [[nubs]]

* Touchscreen

* Microphone

== Connectivity ==

* [[Wi-Fi|802.11b/g Wi-Fi]]

* [[Bluetooth|Bluetooth 2.0 + EDR]] (3Mbps)

* [[USB_reference|USB]]
*# Standard-A USB host port
*#* Fully powered (500 mA)
*# [[Wikipedia:USB On-The-Go|USB On-The-Go]] mini-AB port.
** You can use anything that has the appropriate drivers. [http://www.gp32x.com/board/index.php?s=&showtopic=38155&view=findpost&p=568882]
** Some devices need to first go through a powered USB hub.

* Two [[Wikipedia:Secure_Digital#SDIO|SDIO]]-capable [[Wikipedia:SDHC#SDHC|SDHC]]/[[Wikipedia:SDHC#SDXC|SDXC]] slots.

* [[Wikipedia:RS-232|RS-232]] included, but a level converter is needed for the [[Wikipedia:Universal asynchronous receiver/transmitter|UART]]. [http://www.gp32x.com/board/index.php?s=&showtopic=38155&view=findpost&p=568882]

== Power ==

* [[Wikipedia:Lithium-ion polymer battery|Lithium-ion polymer]] [[battery]], 4200mAh design capacity.
** 10-20 hours battery life under reasonable load
** 8-12 hours under max CPU load
** 6-8 hours under max CPU load with overclocking
** 5-6 days standby time
** 21 hours playing music with the display off

* Can charge through an AC adapter or USB. [http://www.gp32x.com/board/index.php?s=&showtopic=40659&view=findpost&p=587802]
** Charging with the AC adapter takes about 4 hours from near-empty. In 2 hours you get to about 80%.

* Advanced power management capabilities: only need to set a max clock speed; when the CPU is not doing anything it automatically HALTs and does nothing to save power. [http://www.gp32x.com/board/index.php?s=&showtopic=38155&view=findpost&p=574380]

* Suspend to RAM or suspend to disk functionality is being developed. This will give longer battery life and faster start up.
** See [[Power modes]].

= More Information =

* [[FAQ]]
* [[Hardware documentation]]
* [[Pandora history]]

[[Category:Hardware]]
[[Category:List]]