The bug is also reproducible on Ubuntu 26.04, again in both Firefox and
Chromium on windy.com. Note that the "GPU HANG: ecode 12:1:84dffffb"
line is the same error as Ubuntu 24.04.
[Thu Jun 11 17:32:46 2026] i915 0000:00:02.0: [drm] Resetting rcs0 for
preemption time out
[Thu Jun 11 17:32:46 2026] i915 0000:00:02.0: [drm] *ERROR* GT0: rcs0 reset
request timed out: {request: 00000001, RESET_CTL: 00000001}
[Thu Jun 11 17:32:46 2026] i915 0000:00:02.0: [drm] GPU HANG: ecode
12:1:84dffffb, in CanvasRenderer [9407]
[Thu Jun 11 17:32:46 2026] i915 0000:00:02.0: [drm] GPU error state saved to
/sys/class/drm/card1/error
[Thu Jun 11 17:32:58 2026] Fence expiration time out
i915-0000:00:02.0:CanvasRenderer[9407]:2cc!
[Thu Jun 11 17:32:58 2026] Fence expiration time out
i915-0000:00:02.0:gnome-shell[8094]:faa!
[Thu Jun 11 17:32:58 2026] Fence expiration time out
i915-0000:00:02.0:Renderer[9392]:a06!
[Thu Jun 11 17:32:58 2026] Fence expiration time out
i915-0000:00:02.0:CanvasRenderer[9407]:2ce!
[Thu Jun 11 17:32:58 2026] Fence expiration time out
i915-0000:00:02.0:Renderer[9392]:a08!
[Thu Jun 11 17:32:58 2026] Fence expiration time out
i915-0000:00:02.0:CanvasRenderer[9407]:2d0!
[Thu Jun 11 17:32:58 2026] Fence expiration time out
i915-0000:00:02.0:CanvasRenderer[9407]:2d2!
[Thu Jun 11 17:32:58 2026] Fence expiration time out
i915-0000:00:02.0:CanvasRenderer[9407]:2d4!
[Thu Jun 11 17:32:58 2026] Fence expiration time out
i915-0000:00:02.0:CanvasRenderer[9407]:2d6!
[Thu Jun 11 17:33:05 2026] Fence expiration time out
i915-0000:00:02.0:gnome-shell[8094]:fac!
[Thu Jun 11 17:33:05 2026] Fence expiration time out
i915-0000:00:02.0:gnome-shell[8094]:fae!
[Thu Jun 11 17:33:14 2026] i915 0000:00:02.0: [drm] GPU HANG: ecode
12:1:84dffffb, in CanvasRenderer [9407]
[Thu Jun 11 17:33:14 2026] i915 0000:00:02.0: [drm] Resetting rcs0 for stopped
heartbeat on rcs0
[Thu Jun 11 17:33:14 2026] i915 0000:00:02.0: [drm] *ERROR* GT0: rcs0 reset
request timed out: {request: 00000001, RESET_CTL: 00000001}
[Thu Jun 11 17:33:14 2026] i915 0000:00:02.0: [drm] GT0: Resetting chip for
stopped heartbeat on rcs0
[Thu Jun 11 17:33:14 2026] i915 0000:00:02.0: [drm] *ERROR* GT0: rcs0 reset
request timed out: {request: 00000001, RESET_CTL: 00000001}
[Thu Jun 11 17:33:14 2026] i915 0000:00:02.0: [drm] *ERROR* GT0: rcs0 reset
request timed out: {request: 00000001, RESET_CTL: 00000001}
[Thu Jun 11 17:33:14 2026] i915 0000:00:02.0: [drm] CanvasRenderer[9407]
context reset due to GPU hang
One difference is that gnome-shell CPU usage is lower and does not cause the
shell to hang indefinitely, although in my tests I found the entire graphical
shell is still unresponsive for 30 seconds or more.
** Attachment added: "journalctl-excerpt.txt"
https://bugs.launchpad.net/ubuntu/+source/linux-hwe-6.17/+bug/2155197/+attachment/5976983/+files/journalctl-excerpt.txt
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https://bugs.launchpad.net/bugs/2155197
Title:
i915: Resetting rcs0 for preemption time out, GPU hang
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