You mentioned in the description that you reproduced it using xrandr; please provide the command line you used to reproduce it there.
Enable modesetting debugging; one way to do this is run 'sudo xdiagnose', it's the first checkbox. Reboot, reproduce the bug, and then collect 'sudo dmesg > dmesg.txt' and attach here.
You mentioned in the description that you reproduced it using xrandr; please provide the command line you used to reproduce it there.
Enable modesetting debugging; one way to do this is run 'sudo xdiagnose', it's the first checkbox. Reboot, reproduce the bug, and then collect 'sudo dmesg > dmesg.txt' and attach here.