The last 2 or 3 kernel updates seem to have triggered a regression in
the i915 (internal Intel GPU) driver. I get damaged screen updates,
very noticeable tearing on videos and occasional freezes in the DE
(Plasma under X11). A look at the journal shows:
Feb 19 16:33:16 Bree kernel: i915 0000:00:02.0: [drm] GPU HANG: ecode 7:1:cbd2d2d2, in
chrome [8728]
Feb 19 16:33:16 Bree kernel: GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
Feb 19 16:33:16 Bree kernel: The GPU crash dump is required to analyze GPU hangs, so
please always attach it.
Feb 19 16:33:16 Bree kernel: GPU crash dump saved to /sys/class/drm/card0/error
Feb 19 16:33:16 Bree kernel: i915 0000:00:02.0: [drm] chrome[8728] context reset due to
GPU hang
Feb 19 16:33:22 Bree kernel: i915 0000:00:02.0: [drm] GPU HANG: ecode 7:1:85ffbff8, in
chrome [9071]
Feb 19 16:33:22 Bree kernel: i915 0000:00:02.0: [drm] chrome[9071] context reset due to
GPU hang
Feb 19 16:33:59 Bree kernel: i915 0000:00:02.0: [drm] GPU HANG: ecode 7:1:7f7f7f7f, in
chrome [9160]
Feb 19 16:33:59 Bree kernel: i915 0000:00:02.0: [drm] chrome[9160] context reset due to
GPU hang
Feb 19 23:43:39 Bree kernel: i915 0000:00:02.0: [drm] GPU HANG: ecode 7:1:85fffffc, in
Xorg [1182]
Feb 19 23:43:39 Bree kernel: i915 0000:00:02.0: [drm] Xorg[1182] context reset due to GPU
hang
Feb 20 11:23:50 Bree kernel: i915 0000:00:02.0: [drm] GPU HANG: ecode 7:1:85fffff8, in
plasmashell [17364]
Feb 20 11:23:50 Bree kernel: i915 0000:00:02.0: [drm] plasmashell[17364] context reset due
to GPU hang
Feb 20 11:23:53 Bree kernel: i915 0000:00:02.0: [drm] GPU HANG: ecode 7:1:85fffdfc, in
plasmashell [17364]
Feb 20 11:23:53 Bree kernel: i915 0000:00:02.0: [drm] plasmashell[17364] context reset due
to GPU hang
Unfortunately I'd rebooted before looking at the journal, so
/sys/class/drm/card0/error is currently empty. I'll capture it next
time around, but it the meantime has anyone else seen this?
poc