|Summary:||No display backlight when resuming eeepc from sleep|
|Product:||[Fedora] Fedora||Reporter:||Carlo Raudino <carloraudino>|
|Component:||pm-utils||Assignee:||Phil Knirsch <pknirsch>|
|Status:||CLOSED RAWHIDE||QA Contact:||Fedora Extras Quality Assurance <extras-qa>|
|Version:||9||CC:||amlau, bnocera, opensource, richard, rvokal|
|Fixed In Version:||Doc Type:||Bug Fix|
|Doc Text:||Story Points:||---|
|Last Closed:||2008-06-14 10:49:23 UTC||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
|Cloudforms Team:||---||Target Upstream Version:|
|Bug Depends On:|
Description Carlo Raudino 2008-06-13 08:39:15 UTC
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
Comment 1 Richard Hughes 2008-06-13 10:01:34 UTC
Have you tried "pm-suspend --quirk-reset-brightness" ?
Comment 2 Carlo Raudino 2008-06-13 10:15:34 UTC
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?
Comment 3 Richard Hughes 2008-06-13 11:19:14 UTC
>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?
Comment 4 Carlo Raudino 2008-06-13 12:00:06 UTC
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....
Comment 5 Bastien Nocera 2008-06-13 18:30:09 UTC
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.
Comment 6 Carlo Raudino 2008-06-13 19:00:23 UTC
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....
Comment 7 Carlo Raudino 2008-06-13 19:07:45 UTC
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.
Comment 8 Carlo Raudino 2008-06-14 10:49:23 UTC
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 :)