https://bugs.freedesktop.org/show_bug.cgi?id=107731 --- Comment #1 from L.S.S. --- Having similar issues with Manjaro Linux (4.20 Kernel) and AMD video cards. I've a 4K@60Hz capable monitor (Lenovo ThinkVision P27) and an ATEN CS1924 KVM behind it (as I need to use this monitor for 4 different PCs). I've two PCs with Manjaro Linux and AMD GPU, and I can 100% reproduce the issue on both of them. This happens whenever I power off the monitor (or when it went idle). After powering the monitor back on, it reverts to a lower resolution (During most cases, xrandr reported max 2048x1536 but it actually picked 1792x1344. Recently I also noticed sometimes xrandr would report only 800x600). It can be fixed by switching the input channel back and forth on the KVM (which I think is equivalent to unplugging and replugging the DP port). On one of the PCs, it used to have an nVidia video card before replacing it with Radeon VII. With an nVidia video card, this issue did not occur (using same configuration). When this happens, I can find this red line in dmesg. Other log entries are mostly about on-monitor USB hubs and such, and they're irrelevent to the issue from the look of it. [drm:dm_restore_drm_connector_state [amdgpu]] *ERROR* Restoring old state failed with -22 -- You are receiving this mail because: You are the assignee for the bug.