Public bug reported:
systemd-backlight saves the brightness value right before
shutdown.target, however it doesn't work because the nvidia_0 backlight
sysfs disappears after GFX device is closed by Xorg, long before
shutdown.target.
[Impact]
System can not keep the brightness value, after reboot/poweroff the brightness
will still be highest.
[Fix]
Suggested by Nvidia, we need to run nvidia-persistenced.service before
systemd-backlight@backlight:nvidia_0.service
[Test Case]
Adjust the brightness value, reboot, the value must keep persistence during
boots.
[Regression Risk]
Low, this fix is just adjust the systemd order more earier.
** Affects: oem-priority
Importance: Critical
Assignee: hugh chao (hugh712)
Status: Confirmed
** Affects: oem-priority/focal
Importance: Undecided
Status: New
** Affects: nvidia-graphics-drivers-440 (Ubuntu)
Importance: Undecided
Status: New
** Tags: oem-priority originate-from-1878580 stella
** Information type changed from Proprietary to Public
** Changed in: oem-priority
Assignee: (unassigned) => hugh chao (hugh712)
** Changed in: oem-priority
Importance: Undecided => Critical
** Changed in: oem-priority
Status: New => Confirmed
** Also affects: oem-priority/focal
Importance: Undecided
Status: New
** Also affects: nvidia-graphics-drivers-440 (Ubuntu)
Importance: Undecided
Status: New
** Tags added: originate-from-1878580 stella
** Tags added: oem-priority
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https://bugs.launchpad.net/bugs/1885087
Title:
Can't keep brightness value after reboot/poweroff in some nvidia gfx
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