В Sat, 20 Dec 2014 09:15:58 +0100
Stanislav Baiduzhyi
openSUSE 13.2, KDE4, ThinkPad T540p.
I've tried couple of different ways to do it, none of them produced any result.
First I've tried setting udev rule. During the boot I see the brightness dropping from 100% to value I've set, but in less than a second it is restored back to 100%.
Then I tried systemd-backlight@.service. I don't know if I did it correctly, I symlinked it from /usr/lib/systemd to multiuser wants in etc, renaming to systemd-backlight@backlight:intel_video.service, to force it to use my
backlight service is started automatically by udev rule if backlight device is found. /usr/lib/udev/rules.d/99-systemd.rules:SUBSYSTEM=="backlight", TAG+="systemd", IMPORT{builtin}="path_id", ENV{SYSTEMD_WANTS}+="systemd-backlight@backlight:$name.service"
backlight device. I've tried running the command manually, looks like it saves the level properly into /var/lib/systemd, but then after reboot saved value again appears to be 100%. Maybe on reboot, when KDE session is stopped then backlight is restored back to 100% right before systemd saves it?
May be. So boot in run level 3, set desired backlight level, reboot in run level 3 again and check if value is preserved.
So, what is the correct way to force default backlight brightness level for openSUSE?
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