I’m running a dual monitor setup and have been having problems getting them to stay suspended when I’m not using the computer. I first noticed that despite my Power settings set to blank the screens after five minutes, this feature would often stop working until I logged out of my account or rebooted the computer. As a workaround, I started locking the screen when I wanted to suspend the monitors, however I find that most mornings both monitors have come out of sleep mode. The screens are blank, but the backlights are on.
Does anyone know how I would go about troubleshooting this?
System specs:
OS: Ubuntu 24.10
Monitor 1: Samsung LC27JG52QQNXZA
Monitor 2: ASUS ProArt Display PA278QV
Graphics card: NVIDIA GeForce RTX 4070 Super
This is something I’ve observed in Jammy whenever I’d play a game via Steam. Once the game ends, the screen will no longer go into “sleep” mode when the system locks. The only way to restore it is to log out and back on. If you’re using Xorg as the display manager then restarting Gnome SOMETIMES restores the proper behavior. This is not possible if you’re running Wayland.
In addition, whenever any kind of system notification occurs (receiving an Email, transferring a file to the “sleeping” system, etc) the screen will power back on as well.
Interesting. I think my issue is slightly different, though. I don’t use Steam and I can put the display to sleep by locking the screen. I’ve also been able to prevent notifications from waking it up. However, often times the backlight on both displays comes back on after a number of hours and sometimes the cursor appears, as well. I’m still not sure why.