Public bug reported: After updating mutter (around Dec 2025, version 46.2-1ubuntu0.24.04.13), my system started to experience OOM crashes while the screen is locked.
This coincides with a behavioral change where external monitors now enter power-save mode instead of just blanking. Previously: - external monitor blanked but stayed "on" Now: - external monitor powers off (DPMS) - Sometimes after some time locked → system OOMs. - I'm experiencing this OOM almost every day. - OOM has not happened, when I'm normally using computer. Only when I'm away. This started after mutter update: 46.2-1ubuntu0.24.04.13 I'm quessing this might be related to these fixes: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1971434 (monitor power-off change) https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2131575 (monitor-manager changes) ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: mutter 46.2-1ubuntu0.24.04.14 ProcVersionSignature: Ubuntu 6.8.0-106.106-generic 6.8.12 Uname: Linux 6.8.0-106-generic x86_64 ApportVersion: 2.28.1-0ubuntu3.8 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: ubuntu:GNOME Date: Tue Mar 31 00:32:53 2026 InstallationDate: Installed on 2022-02-09 (1510 days ago) InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819) SourcePackage: mutter UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: mutter (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug noble wayland-session ** Description changed: After updating mutter (around Dec 2025, version 46.2-1ubuntu0.24.04.13), my system started to experience OOM crashes while the screen is locked. This coincides with a behavioral change where external monitors now enter power-save mode instead of just blanking. Previously: - external monitor blanked but stayed "on" Now: - external monitor powers off (DPMS) - - after some time locked → system OOMs. + - Sometimes after some time locked → system OOMs. - I'm experiencing this OOM almost every day. - - OOM has not happened, when I'm normally using computer. Only when I'm away + - OOM has not happened, when I'm normally using computer. Only when I'm away. - The bug started to happen when these two fixes were released This started after mutter update: 46.2-1ubuntu0.24.04.13 I'm quessing this might be related to these fixes: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1971434 (monitor power-off change) https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2131575 (monitor-manager changes) ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: mutter 46.2-1ubuntu0.24.04.14 ProcVersionSignature: Ubuntu 6.8.0-106.106-generic 6.8.12 Uname: Linux 6.8.0-106-generic x86_64 ApportVersion: 2.28.1-0ubuntu3.8 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: ubuntu:GNOME Date: Tue Mar 31 00:32:53 2026 InstallationDate: Installed on 2022-02-09 (1510 days ago) InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819) SourcePackage: mutter UpgradeStatus: No upgrade log present (probably fresh install) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2146851 Title: OOM during screen lock after mutter DPMS change To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2146851/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
