Did some more testing:
* If I logout when the screen flickers, it also flickers in the login
screen after logging out and also after logging back in.
* After a reboot (without logging in), the flickering disappears. After
suspending from there and waking up, the flickering appears on the login
Public bug reported:
I upgraded my Ubuntu 20.04 system with a new graphics card a few days ago.
Everything seems fine when running the system normally, however whenever I
suspend the machine and then wake it back up, severe problems occur.
The first time, the machine froze completely. Switching
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