Measurements: Massive Display-related power savings
Michael 'Mickey' Lauer
mickey at openmoko.org
Thu Oct 9 03:44:48 CEST 2008
Am Mittwoch, den 08.10.2008, 20:43 +0200 schrieb Harald Welte:
> Hi all (Cc'ing mickey since I don't know if you read the kernel list)!
I'm reading it. I'm the userland ambassador :)
> FSO image, screen backlight full on, CPU idle 177mA
> same using frameworkd/sysfs based screen blank 99mA
> same using manual "sleep" into jbt sysfs file 83mA
> same using manual "deep-standby" into jbt 82mA
> same plus disabling glamo DCLK pixel clock 59mA
Amazing work, well done.
> FSO should switch the backlight control from the sysfs method to the
> fbdev-ioctl method. It's backwards compatible to old kernels (which will just
> backlight-blank) and future-compatible with kernels that add the jbt6k74
> notifier and glamo fb_blank() patches.
Agreed -- I will reply to your mail to
smartphones-standards at linuxtogo.org later today.
> This additional battery life time was brougt to you by Swisscom ;)
More information about the openmoko-kernel