Bug#1128843: Bug #1128843 – repeated NVIDIA DRM warnings and Plasma desktop freeze on Debian 13

[Lucas]

Hello,

I would like to add further information to bug #1128843, concerning 
repeated NVIDIA DRM warnings on Debian 13.

System configuration
- Operating system: Debian 13 (Trixie)
- Kernel: 6.12.113+deb13-amd64
- NVIDIA driver: 550.163.01-4~bpo13+1
- Graphics card: NVIDIA GeForce RTX 2070 SUPER
- Motherboard: MSI B450 GAMING PLUS MAX
- Desktop environment: KDE Plasma 6, Wayland
- Display manager: SDDM
Description of the incident

On October 29, 2026, I experienced a complete desktop freeze while 
browsing the internet. The problem occurred approximately two hours 
after I had installed and completed a system update. I had to force a 
shutdown because the system was no longer responding.

During the incident, system monitoring showed the following:
- plasmashell was using approximately 28.1 GiB of resident memory.
- Total RAM usage was approximately 30.9 GiB out of 31.3 GiB.
- The 32 GiB swap partition was completely full.
- CPU usage was high across multiple cores.
Relevant log messages

The previous boot journal contains repeated kernel warnings:

WARNING: CPU ... at 
/var/lib/dkms/nvidia-current/550.163.01/build/nvidia-drm/nvidia-drm-drv.c:1226 
nv_drm_revoke_modeset_permission+0x327/0x340 [nvidia_drm]

These warnings appeared repeatedly during startup and later in the session.

Shortly before the freeze, the journal recorded:

systemd-journald: Under memory pressure, flushing caches.

This message appeared several times. The logs also contain repeated 
messages from kwin_wayland_wrapper stating that key-repeat events were 
discarded because the Wayland compositor was not processing events fast 
enough.

There were also PipeWire buffer-related messages around the same time.

I could not find any explicit out-of-memory or OOM-killer messages in 
the journal.

After reboot

After restarting the system, memory usage returned to normal. The 
plasmashell process was no longer consuming an unusually large amount of 
memory.

I cannot establish whether the NVIDIA DRM warnings caused the memory 
consumption or whether these are separate problems. However, the 
repeated warnings, extreme memory usage and desktop freeze occurred on 
the same system.

Could you advise whether these observations are relevant to this bug and 
whether further diagnostic information would be useful?

Please note that English is not my native language, and my English 
skills are limited. I used an AI assistant to help me translate and 
formulate this report in English. The technical information and 
observations are based on my own system and its log files.

Kind regards
Lucas

-- 
Ich akzeptiere nur E-Mails mit aktueller TLS-Verschlüsselung (kein 
SSLv3, TLS 1.0/1.1).
Anhänge sind auf PDF, TXT, PNG und JPG beschränkt.

TLS-Empfangsgarantie aktiv – Unverschlüsselte Verbindungen werden abgelehnt.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: debian13-previous-boot-system.log
Type: text/x-log
Size: 1527451 bytes
Desc: not available
URL: <http://alioth-lists.debian.net/pipermail/pkg-nvidia-devel/attachments/20261029/3b6360dc/attachment-0001.bin>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: htop.jpg
Type: image/jpeg
Size: 1173972 bytes
Desc: not available
URL: <http://alioth-lists.debian.net/pipermail/pkg-nvidia-devel/attachments/20261029/3b6360dc/attachment-0001.jpg>