Log for build 20080102

Rólam
   Főoldal
   Önéletrajzom
   Képek

Tanulmányok és Oktatás
   EAF1
   EAF3
   EAF4
   Fontkészlet
   PNY1
   PP
   ProgKör
   Visual Basic

Érdeklődési körök
   Linux
   Linux PalmLD
   RDiff

Munkák
   Önéletrajz
   CV in English




utolsó módosítás:
2010. augusztus 9.

The main problem with this image is the fact that is loosing battery power at high speed even if the device is in sleep mode.

First suspected issue is that there is a sx2_udc kernel module loaded while TP2 does not loads this kernel module.

Research indicated that this module could be responsibly for the USB connection (however there is a PXA 27x implementation for the USB Peripherial Controller, guessing that should be more suitable for the hardware).

If I remove the module from loaded ones, battery draining ends?

It seems that removing sx2_udc module from the image (and thus avoid loading it) resolves the problem, but battery life should be extended. Should give a try to newest kernel (git log says that it has improvements for battery life).

However sx2_udc module is not the only thing causing battery life sortance because for a 22 hours period the battery was nearly exhausted in sleep mode.

Other things possibly causing the problem

  • Check if most up to date kernel has this bug.
  • Suspend command executed by the suspend menu can differ.
  • A process running in the built image, not running on TP2 is executed.