Comment # 9
on bug 111913
from Andrew Sheldon
(In reply to Stefan Rehm from comment #8) > In my case the resolution of both monitors is 2560x1440 You could try overclocking (or underclocking) one or both monitors to see if the bug still exists, using: https://github.com/kevinlekiller/cvt_modeline_calculator_12 I recommend using the "-b" option which uses reduced blanking V2 mode, but you could experiment with different options. Then to use it: xrandr --output <monitor output> --newmode <modeline name> <modeline details from cvt> xrandr --output <monitor output> --addmode <monitor output> <modeline name> xrandr --output <monitor output> --mode <modeline name> Modeline name being whatever you like. You'll probably have to launch X with one of the monitors disconnected (as the bug may trigger before you can apply the modeline change). I believe the amdgpu DDX has support for specifying modelines, but I don't know the syntax off the top of my head.
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