Public bug reported: Brightness Reset to Maximum on Nvidia GPU Desktop when setting on Blank Screen
The Desktop LED Monitor brightness or Gamma level is not preserved and reset when I set gnome-control-center setting on Power to Blank Screen. I try to post as much details as possible. -I did a test by setting Nvidia X Server Color Correction and set any brightness and gamma.It get reset when Power Saving Blank Screen time active which I had set 10 minutes to save power by auto turning off the display. -The second test was by installing a Brightness Controller which use Xrandr but same result of getting reset when I set Blank Screen.I also manually set xrandr --output DVI-D-0 –brightness 0.5 --gamma 0.5:0.5:0.5 an value get reset after the trigger from blank screen. -Third test by selecting Nouveau open source but same result of getting reset when I set Blank Screen. -Forth test , manually turn off the monitor ‘xset dpms force off’ it doesn’t trigger the brightness reset. Since the system is using Desktop GPU , the folder on xblacklight is empty without config files. The flow > Set brightness > Power Saving Blank Screen time active > Brightness reset > > External Monitor dim and Turn Off > Press any keyboard button to wakeup the > display > Brightness Stay at reset value of Full 100% brightness. The details I had tested , I suspect gsd-power may have related to this issue.This is happen before which I had find a solution to other brightness reset happen when every restart , delete a files upon restart , open a web browser with and play a video stream, login and logout , suspend and Power Saving Blank Screen. All of this are affected by gsd-color.Which I had found a link a fix suggestion https://github.com/LordAmit/Brightness/issues/102#issuecomment-374253884 by disable /usr/lib/gnome-settings-daemon/gsd-color on startup. The only left is Power Saving Blank Screen still get reset when it get active.I am not too sure whether it is related to gsd-power , I did disable it but it also disable Power Saving Blank Screen together. It just goes to screensaver mode and did not turn off the monitor. I do not have any basic on gsd-power code https://gitlab.gnome.org/starnight/gnome-settings- daemon/blob/c64c243e345cb92ed0c197a377767bcbf1704c1b/plugins/power/gsd- power-manager.c Not knowing which line did it callback and get reset , presumably ‘GSD_POWER_IDLE_MODE_BLANK’ ? Fresh Install OS : Ubuntu 18.04.4 Architecture: amd64 Nvidia : GTX 1050 Driver : NVIDIA Driver Version: 440.100 uname : 5.4.0-42-generic DisplayManager: gdm3 Journalctl log when blank screen active. nvidia-settings[19556]: PRIME: is it supported? no nvidia-settings[19556]: PRIME: No offloading required. Abort nvidia-settings[19556]: g_object_unref: assertion 'G_IS_OBJECT (object)' failed Check that logind is properly installed and pam_systemd is getting used at login. gnome-session[1521]: gnome-session-binary[1521]: WARNING: Could not get session path for session. Check that logind is properly installed and pam_systemd is getting used at login. gnome-screensav[1551]: Source ID 19140 was not found when attempting to remove it gnome-session-binary[1521]: WARNING: Could not get session path for session. Check that logind is properly installed and pam_systemd is getting used at login. gnome-session[1521]: gnome-session-binary[1521]: WARNING: Could not get session path for session. Check that logind is properly installed and pam_systemd is getting used at login. Reading the log shows somewhere it trigger brightness reset.The Nvidia Setting prime message is show because I am using a desktop dedicated GPU without using nvidia prime for laptop check to switching between build in intel gpu and nvidia. In which way I could fix brightness reset when I need to set Blank Screen to turn off the monitor to save power ? I did another test by manually turn off the monitor ‘xset dpms force off’ it doesn’t trigger the brightness reset.It only happen when it is set with a timer at setting blank screen to 1-15 minutes and which it call for a PID which unknown and I assume gsd-power that trigger the reset. The most I can find is the gsd-power code https://gitlab.gnome.org/starnight/gnome-settings- daemon/blob/c64c243e345cb92ed0c197a377767bcbf1704c1b/plugins/power/gsd- power-manager.c .I am nor expert on daemon.service pin point the trigger. I did a search at askubuntu , ubuntu forum and ask around at ubuntu irc channel but did not get any similar result. Either it happen in my system or it happen to everyone using Nvidia dedicated GPU on desktop.I may need someone who using them willing to help on testing out whether it happen on everyone. Any solution to fix brightness reset but retain power saving on monitor turn off automatically with blank screen ? ** Affects: gnome-shell (Ubuntu) Importance: Undecided Status: New ** Tags: blank brightness color nvidia power screen -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1892094 Title: Nvidia Desktop Brightness Reset on Blank Screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1892094/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
