Moved to Xorg and the bug stopped. Issue likely from gnome + wayland
combo. gnome's mutter is allocating GPU during lockscreen and not
deallocating it. This builds up and consumes the shared memory of new
iGPUs, resulting in an OOM.
** Also affects: gnome-shell (Ubuntu)
Importance: Undecided
Status: New
** Description changed:
ShmemHugePages grows continuously while the screen is locked, consuming all
64GB RAM + 8GB swap, triggering the OOM killer. No single process accounts for
the shmem — pages are orphaned in pagecache.
Hardware — Lenovo ThinkPad 21QDCTO1WW, intel 225H CPU, with ARC 130T GPU.
- Software — Ubuntu version, kernel 6.17.0-1012-oem, GNOME on Wayland,
+ Software — Ubuntu version, kernel 6.17.0-1012-oem, GNOME on Wayland,
GPU driver version: Kernel driver in use: i915
- Kernel modules: i915, xe
+ Kernel modules: i915, xe
Steps to reproduce — Log in to GNOME Wayland session, lock the screen, leave
idle for 3-7 hours, observe ShmemHugePages in /proc/meminfo growing continuously
- Evidence — Attach shmem_track.txt
+ Evidence — Attach shmem_track.txt
The issue started post update to the 6.17.0-1012-oem. This has repeated
multiple times over the last 3 days. The entire gnome session and, in
some cases, even the psmouse driver got killed when I left the laptop
untouched for hours.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-oem-6.17-headers-6.17.0-1012 6.17.0-1012.12
ProcVersionSignature: Ubuntu 6.17.0-1012.12-oem 6.17.9
Uname: Linux 6.17.0-1012-oem x86_64
ApportVersion: 2.28.1-0ubuntu3.8
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Mon Mar 2 23:49:53 2026
InstallationDate: Installed on 2026-02-12 (18 days ago)
InstallationMedia: Ubuntu 24.04.3 LTS "Noble Numbat" - Release amd64
(20250805.1)
PackageArchitecture: all
ProcEnviron:
- LANG=en_US.UTF-8
- PATH=(custom, no user)
- SHELL=/bin/bash
- TERM=xterm-256color
- XDG_RUNTIME_DIR=<set>
+ LANG=en_US.UTF-8
+ PATH=(custom, no user)
+ SHELL=/bin/bash
+ TERM=xterm-256color
+ XDG_RUNTIME_DIR=<set>
SourcePackage: linux-oem-6.17
UpgradeStatus: No upgrade log present (probably fresh install)
** No longer affects: linux-oem-6.17 (Ubuntu)
--
You received this bug notification because you are a member of Ubuntu
Desktop Bugs, which is subscribed to gnome-shell in Ubuntu.
https://bugs.launchpad.net/bugs/2143074
Title:
ShmemHugePages leak during GNOME lock screen on 6.17.0-1012-oem causes
OOM
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/2143074/+subscriptions
--
desktop-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
