Repeated GPU hang on bcs0 [kabylake]
After about 40 hours of uptime on the Linux 5.13.1 kernel, I encountered a perceived input issue which prompted me to investigate Xorg.0.log. The log greeted me with "Failed to submit rendering commands (Input/output error), disabling acceleration." Upon realization I collected the kernel log and the card0 error state, which I have attached.
I don't know much else as to the cause; I was using mate-terminal (vte3-based) with Firefox minimized/out of focus. I was using the 5.13rc5 kernel for over a month without issue, so it might be a regression, although it could also be a userspace issue.
Should next step be drm-tip + drm.debug=0x1e?
Here is the relevant excerpt of the kernel log (repeated 4 times):
[143768.871164] kernel: i915 0000:00:02.0: [drm] Resetting bcs0 for CS error
[143768.871176] kernel: i915 0000:00:02.0: [drm] Xorg[453] context reset due to GPU hang
[143768.872127] kernel: i915 0000:00:02.0: [drm] GPU HANG: ecode 9:2:effffff7, in Xorg [453]