Created attachment 146024 [details]
I got the following kernel messages :
[84210.276973] i915 0000:00:02.0: GPU HANG: ecode 9:0:0x00000000, hang on rcs0
[84210.276974] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
[84210.276974] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
[84210.276975] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
[84210.276975] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
[84210.276976] [drm] GPU crash dump saved to /sys/class/drm/card0/error
So I reported the bug. The crash dump is attached.
*** This bug has been marked as a duplicate of bug 111970 ***