It may also help to enable drm debug messages before testing the kernel:
Run 'sudo xdiagnose', then tick the first checkbox, apply, wait for grub to rebuild, then reboot the machine, reproduce the issue, and collect /var/log/dmesg.
It may also help to enable drm debug messages before testing the kernel:
Run 'sudo xdiagnose', then tick the first checkbox, apply, wait for grub to rebuild, then reboot the machine, reproduce the issue, and collect /var/log/dmesg.