After login on a x11 gnome gdm3 sesssion,
display hangs, crash, becomes black, and occasionally freeze the computer.
Which is an imac 27" 2011.
But
- i'm not sure it's a mesa bug, maybe a linux kernel bug triggered by the mesa update
- i think it's appearing only on large displays like 2560x1440.
- i don't know how to get logs from previous boots with journalctl
I remember something about "cs ring radeon", etc..
Please help because it's a real bug !
Jérémy