** Also affects: systemd (Ubuntu)
Importance: Undecided
Status: New
** Also affects: nvidia-graphics-drivers-375 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1681493
Title:
Ubuntu Zesty: Problem With Screen Brightness Settings
Status in NVIDIA Drivers Ubuntu:
New
Status in nvidia-graphics-drivers-375 package in Ubuntu:
New
Status in systemd package in Ubuntu:
New
Bug description:
Non-Optimus laptop ASUS G752VS (Nvidia GTX1070)
Ubuntu 17.04
Xorg-Server-1.19.3
Nvidia driver 375.39
Situation on 2017-04-05:
Ubuntu 17.04 doesn't save my brightness settings. I can adjust the screen
brightness, but after restarting the screen brightness of my laptop resets to
maximum.
Situation on 2017-04-08:
Today I received many Ubuntu updates (kernel included), and I also installed
freshly released Nvidia 381.09 driver (via “Graphics Drivers” team -
Proprietary GPU Drivers PPA).
Now brightness settings are correctly saved, but I have a new problem:
changing brightness level doesn't produce any effect (both with or without
Nvidia driver installed)
Inside "/sys/class/backlight/" I have two folders: "acpi_video0" and
"acpi_video1"
~$ systemctl status systemd-backlight@backlight:acpi_video0.service
● systemd-backlight@backlight:acpi_video0.service - Load/Save Screen
Backlight B
Loaded: loaded (/lib/systemd/system/systemd-backlight@.service; static;
vendo
Active: active (exited) since Sat 2017-04-08 13:37:31 CEST; 16min ago
Docs: man:systemd-backlight@.service(8)
Main PID: 683 (code=exited, status=0/SUCCESS)
~$ systemctl status systemd-backlight@backlight:acpi_video1.service
● systemd-backlight@backlight:acpi_video1.service - Load/Save Screen
Backlight B
Loaded: loaded (/lib/systemd/system/systemd-backlight@.service; static;
vendo
Active: active (exited) since Sat 2017-04-08 13:37:31 CEST; 22min ago
Docs: man:systemd-backlight@.service(8)
Main PID: 684 (code=exited, status=0/SUCCESS)
Situation on 2017-04-10:
I purged Nvidia 381.09 driver and reinstalled default Nvidia 375.39 via
additional drivers.
Now the situation has returned to initial problem: I can again adjust the
screen brightness, but after restarting the screen brightness of my laptop
again resets to maximum.
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