**System Configuration:** - Ubuntu 24.04 LTS - Mutter: 46.2-1ubuntu0.24.04.13 (buggy) - GNOME Shell: 46.0-0ubuntu6~24.04.12 - Hardware: 30GB RAM, 32GB swap, single physical display - Session: Wayland
**Timeline:** - **December 13, 2025 @ 19:56**: Upgraded mutter .12 → .13 - **Same day**: System instability began - **Ongoing**: OOM killer every 2-3 hours until downgrade **Symptoms matching this bug:** 1. **Continuous KMS thread failures** (every 6-7 seconds): ``` Failed to make thread 'KMS thread' meta_output_get_monitor: runtime check failed: (priv->monitor) ``` 1. **Shared memory explosion**: - Normal: 60 MB - During leak: **12 GB** (200x increase) - Leak rate: ~340 MB/minute 1. **Complete system exhaustion**: - RAM: 99.7% used (29.7GB/29.8GB) - Swap: 100% full (32GB/32GB) - OOM killer invoked, forced logout **Key Finding:** The leak was invisible in process memory (`top`, `ps`) making it difficult to diagnose. **Workaround - Downgrade to .12:** Downgrading to mutter 46.2-1ubuntu0.24.04.12 **completely resolves** the issue: - Swap usage: 32GB → 0GB - RAM usage: 29GB → 4GB - Shared memory: 12GB → 144MB - System stable 24+ hours with no crashes - KMS thread errors: GONE Held packages to prevent auto-upgrade **Impact:** This bug makes Ubuntu 24.04 **completely unusable** on affected systems. System becomes unresponsive within hours, causing data loss and inability to work. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2137067 Title: Xwayland crashes and OOM kills after upgrading to mutter 46.2-1ubuntu0.24.04.13 with DisplayLink/evdi displays To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2137067/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
