Arch Linux

ought

Member

Registered: 2016-06-04

Posts: 39

DP-connected monitors randomly turn off

Hello! I recently reinstalled Arch from scratch, and I have intermittent problems - when I launch a GUI application (like Discord or Okular), there is a small chance that two of my three monitors (connected with DP) will turn off, leaving only the HDMI-connected one (which is the leftmost of them). The LEDs are dimmed, like in situations where PC is turned off too.
Even more surprisingly, Linux does not recognize that it turned them off and treats them like they are still present - for example, I can move windows with Win+Right/Left between an HDMI monitor and the other (turned off) monitors.

Here is a journalctl log around the problem: https://paste.ee/p/1zfd8

The way I fix this is either by rebooting, or by launching KDE settings app, turning my monitors off in the settings, hitting "apply", and then turning them on again. This fixes things, but it is really annoying, and I would be really glad if somebody helped me with this problem =-)