Description of problem: Resuming eeePC 701 from sleep, results in no backlight... for getting light back, you need to press FN+F4 (backlight controls) and brightness come back Version-Release number of selected component (if applicable): fedora 9 full updated Actual results: We got it working, with this workaround: http://fedoraproject.org/wiki/EeePc#No_backlight_on_resume_from_suspend_FIX This works for the eeepc701. But doesn't work in eeepc901. In this last one, the user must HARD RESET.... no way to resume backlight. Expected results: Display brightness resuming, without tweaks
Have you tried "pm-suspend --quirk-reset-brightness" ?
Tried now in my eeepc 701: using pm-suspend --quirk-reset-brightness at resume I have brightness at 125 % (it's brighter than usual maximum) , and I can't change the brightness using Fn keys (they usually work directly, also while loading OS) cat /sys/devices/platform/eeepc/brn 0 (wrong value...) It would be nice to test this command in eeepc 900/901, that can't resume with the lamer workaround (reading value and setting it) Any idea?
>cat /sys/devices/platform/eeepc/brn Why isn't the kernel using a standard brightness class? Does xbacklight also change the brightness on this PC?
how to try it? can you tell what to do, to test it out? ps gnome-power-management seems to not see the "brightness"..... I remember with other distributions, it was able to change brightness...for example, with pc idle....
xbacklight isn't shipped by default, it's available here: http://xorg.freedesktop.org/archive/individual/app/xbacklight-1.0.tar.bz2 This uses the X.org driver to set the brightness, and not any kernel bits. Try it out in X, and see if it allows the brightness to change again after a resume.
I disabled my workaround (so, stock 99video) suspended using: pm-suspend --quirk-reset-brightness Resumed (brightness 125 %....) xbacklight, gives me "100%" value I setted with xbacklight, 50 %..... no change.... but xbacklight reports 50 %.. strange... it's like a "broken" link between hardware and software....
Now (rebooted) I tried: stock 99video script NORMAL SUSPEND (without --quirk-reset-brightness) after resume (black screen....resumed pressinf Fn+F4) xbacklight: 100 % xbacklight -set 50 ........worked faded to 50 % brightness. so: with stock fedora, and pressing fn+f4 , xbacklight WORKS. using quirk-reset-brightness, xbacklight doesn't work.
GREAT, kernel-2.6.26-0.67.rc6.git1 FIXES THIS PROBLEM! I tried, and backlight is correctly resumed. After, I tried the "stable" kernel, and backlight doesn't work (obviously) with it. So kernel 2.6.26 has a working resume from suspend for brightness. Let's wait this kernel, it takes fresh air to my netbook :)