On 19/11/2025 14:41, Seb wrote:
Is it logical to suspect that the driver may be unreliable?
I would not exclude this possibility just as e.g. hardware failure. Rather generic steps may help to reveal failure reason.
Install latest firmware (BIOS). If it offers an option to run hardware self-test then try it.
Check for errors, warnings, and all other messages related to graphics adapter output of the following command:
sudo journalctl -b
You may discover e.g. missed firmware files.
If X is unreliable then you may use virtual console or ssh login from
another machine (install ssh-server if have not it yet).