Distorted old screen contents randomly appear and flicker when `xrandr --scale 1.5`
Versions: Ubuntu 22.10, Gnome Shell 43.1 (X.Org mode), xserver-xorg-video-amdgpu 22.0.0-3, Sapphire Nitro+ RX 570 (4G)
Distorted old screen contents randomly appear and flicker when the fractional scaling enabled (150%).
It doesn't flicker without the fractional scaling (200%).
I know the fractional scaling is not upstream Gnome Shell's feature,
but it flickers too with manual xrandr --scale 1.5
.
I think it started around Ubuntu 22.04.
I recently changed the GPU, and reinstalled Ubuntu, but it still happens.
I couldn't find relevant logs at the time in journalctl
, or Xorg.log
.
It only happens in Gnome Shell X.Org mode (on both Gnome Shell, Gnome Shell Classic)
I once suspected the mutter triple buffering patch from the Debian, so I built the mutter package without it, but it didn't work.