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GPU hang: i915, Braswell, errcodes 0x85dffff9 and 85dffffb

Description:

  • Usual scenario: Screen freezes, randomly or e.g. when starting an application or opening a menu, then after several seconds recovers. When there's an application playing music in the background, the playback is not interrupted by this. Happens 0-5 times a day. Happens on all kernels tested.
  • Other scenario: Screen freezes as above, but everything stops irreversibly. Happens 0-2 times a day. Happened on Arch's kernel; didn't reproduce on drm-tip kernel yet (short uptime so far).
  • Artifacts: Twice or thrice it happened while a new screen-element was being created and then that element (terminal window, desktop menu) was partially drawn on the screen.

Tried and reproduced under kernels:

When it started:

  • after an update that included the kernel '5.5.10-arch1-1', but i can't trace it exactly, because i haven't been updating very diligently.

journalctl -k reports:

under kernel '5.5.10-arch1-1' without drm.debug kernel params:

	...
	i915 0000:00:02.0: GPU HANG: ecode 8:1:0x85dffff9, in systemd-logind [418], stopped heartbeat on rcs0
	GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
	Please file a _new_ bug report at https://gitlab.freedesktop.org/drm/intel/issues/new.
	Please see https://gitlab.freedesktop.org/drm/intel/-/wikis/How-to-file-i915-bugs for details.
	drm/i915 developers can then reassign to the right component if it's not a kernel issue.
	The GPU crash dump is required to analyze GPU hangs, so please always attach it.
	GPU crash dump saved to /sys/class/drm/card0/error
	Resetting rcs0 for stopped heartbeat on rcs0
	...

under kernel '5.7.903997.c7fa35c8bab0-1' with drm.debug kernel params:

	...
	i915 0000:00:02.0: [drm:intel_plane_atomic_calc_changes [i915]] [CRTC:51:pipe A] with [PLANE:47:cursor A] visible 1 -> 1, off 0, on 0, ms 0
	[drm:drm_atomic_set_fb_for_plane [drm]] Set [FB:121] for [PLANE:47:cursor A] state 000000000b126c0c
	i915 0000:00:02.0: [drm:intel_plane_atomic_calc_changes [i915]] [CRTC:51:pipe A] with [PLANE:47:cursor A] visible 1 -> 1, off 0, on 0, ms 0
	i915 0000:00:02.0: GPU HANG: ecode 8:1:85dffffb, in systemd-logind [372]
	GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
	Please file a _new_ bug report at https://gitlab.freedesktop.org/drm/intel/issues/new.
	Please see https://gitlab.freedesktop.org/drm/intel/-/wikis/How-to-file-i915-bugs for details.
	drm/i915 developers can then reassign to the right component if it's not a kernel issue.
	The GPU crash dump is required to analyze GPU hangs, so please always attach it.
	GPU crash dump saved to /sys/class/drm/card0/error
	i915 0000:00:02.0: Resetting rcs0 for stopped heartbeat on rcs0
	i915 0000:00:02.0: systemd-logind[372] context reset due to GPU hang
	[drm:drm_atomic_set_fb_for_plane [drm]] Set [FB:121] for [PLANE:47:cursor A] state 00000000cd5adeb7
	i915 0000:00:02.0: [drm:intel_plane_atomic_calc_changes [i915]] [CRTC:51:pipe A] with [PLANE:47:cursor A] visible 1 -> 1, off 0, on 0, ms 0
	[drm:drm_atomic_set_fb_for_plane [drm]] Set [FB:121] for [PLANE:47:cursor A] state 000000008dec2456
	i915 0000:00:02.0: [drm:intel_plane_atomic_calc_changes [i915]] [CRTC:51:pipe A] with [PLANE:47:cursor A] visible 1 -> 1, off 0, on 0, ms 0
	[drm:drm_atomic_set_fb_for_plane [drm]] Set [FB:121] for [PLANE:47:cursor A] state 00000000cd5adeb7
	i915 0000:00:02.0: [drm:intel_plane_atomic_calc_changes [i915]] [CRTC:51:pipe A] with [PLANE:47:cursor A] visible 1 -> 1, off 0, on 0, ms 0
	[drm:drm_atomic_set_fb_for_plane [drm]] Set [FB:121] for [PLANE:47:cursor A] state 000000008dec2456
	i915 0000:00:02.0: [drm:intel_plane_atomic_calc_changes [i915]] [CRTC:51:pipe A] with [PLANE:47:cursor A] visible 1 -> 1, off 0, on 0, ms 0
	[drm:drm_atomic_set_fb_for_plane [drm]] Set [FB:121] for [PLANE:47:cursor A] state 00000000cd5adeb7
	i915 0000:00:02.0: [drm:intel_plane_atomic_calc_changes [i915]] [CRTC:51:pipe A] with [PLANE:47:cursor A] visible 1 -> 1, off 0, on 0, ms 0
	...

Attached:

  • dumps.tar.gz
    • dumps/dmesg-pruned
    • dumps/dmidecode
    • dumps/error
    • dumps/error-2

System info:

  • system architecture: x86_64
  • kernel version: (arch) '5.5.10-arch1-1'; (drm-tip) '5.7.903997.c7fa35c8bab0-1' or so
  • Linux distribution: Arch
  • Machine or mother board model: CPU Intel Celeron N3150 (Braswell); more in dmidecode
  • Display connector: VGA
  • GPU crash dump: in error (under arch), error-2 (under drm-tip)

Note on kern. version:

There is a mix-up with the drm-tip kernel, where the 'config' comes from an AUR-distributed package, and has a different version from the kernel sources fetched from https://anongit.freedesktop.org/git/drm-tip.git#branch=drm-tip. Here 'uname -r' reports '5.6.0-rc7-1-drm-tip-gitcstm-gc7fa35c8bab0' and the git-version is marked as '5.7.903997.c7fa35c8bab0-1'.

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