Public bug reported:
Title: gnome-shell i915 GPU HANG (ecode 9:1:85dffffb) on Skylake leaves
Wayland screen black until GDM restart (Ubuntu 26.04)
Hardware: Intel Skylake iGPU (i915, device ID 1912), headless desktop
with an HDMI dummy plug on HDMI-A-2.
Software: Ubuntu 26.04, kernel 7.0.0-42-generic, GNOME Shell 50.1 /
mutter 50.1, Wayland session (GDM autologin).
Symptom: Remote desktop (RustDesk and RDP) shows a black screen. The
output is enabled with DPMS on, gnome-shell still answers on D-Bus, and
the session isn’t locked. Only systemctl restart gdm restores the
picture. Switching VTs makes the screen flicker, then it goes black
again.
Kernel log: Repeated “Resetting rcs0 for preemption time out”, “gnome-
shell context reset due to GPU hang”, “GPU HANG: ecode 9:1:85dffffb, in
gnome-shell”. Hangs on Nov 3 (18:13, 18:36, 19:31), Nov 4 (10:14, 10:22,
15:51), Nov 5 (14:53, 15:26, 15:58, 16:18, 18:09) and Nov 6 (23:12), all
AST. The screen was black right after the hangs at 15:58 on Nov 5 and
23:12 on Nov 6.
gnome-shell journal: Nothing logged after the hang (no EGL errors, no
gbm_surface_lock_front_buffer failures), so it doesn’t seem to notice
that its GPU context was reset.
Tried: Restarting portal/PipeWire, switching VTs, disabling animations
and the desktop-icons extension. Hangs continued.
GPU error state from /sys/class/drm/card1/error is attached.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: gnome-shell 50.1-0ubuntu1.5
ProcVersionSignature: Ubuntu 7.0.0-43.43-generic 7.0.14
Uname: Linux 7.0.0-43-generic x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sun Nov 8 09:35:01 2026
DisplayManager: gdm3
InstallationDate: Installed on 2023-10-27 (1108 days ago)
InstallationMedia: Ubuntu 22.04.3 LTS "Jammy Jellyfish" - Release amd64
(20230807.2)
RelatedPackageVersions: mutter-common 50.1-0ubuntu2.5
SourcePackage: gnome-shell
UpgradeStatus: Upgraded to resolute on 2026-09-30 (39 days ago)
** Affects: gnome-shell (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
** Attachment added: "i915-gpu-error-2026-11-06-2328.txt"
https://bugs.launchpad.net/bugs/2173680/+attachment/6016053/+files/i915-gpu-error-2026-11-06-2328.txt
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https://bugs.launchpad.net/bugs/2173680
Title:
gnome-shell i915 GPU HANG (ecode 9:1:85dffffb) on Skylake leaves
Wayland screen black until GDM restart (Ubuntu 26.04)
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