Bug#1143255: Bug in kernel 6.12.100

From	Ronald Blijlevens <ronald.blijlevens@gmail.com>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1143255: Bug in kernel 6.12.100
Date	2026-08-01 18:50 +0200
Message-ID	<Nnl4l-8jiT-1@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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Source: linux
Version: 6.12.100-1
Severity: normal

Dear Debian Kernel Team,

A regression appears to have been introduced between Debian kernel versions 
6.12.96-1 and 6.12.100-1.

Hardware and software:

NVIDIA GeForce RTX 2080
NVIDIA proprietary driver 550.163.01-4~bpo13+1
KDE Plasma/KWin 6.3.6
Debian 13 amd64
Steam Proton 10 and Proton 11

Steps to reproduce:

Boot Debian with linux-image-6.12.100+deb13-amd64.
Log in to a KDE Plasma Wayland session.
Start The Elder Scrolls IV: Oblivion Remastered through Steam Proton.
Load a saved game and open the in-game map.

Actual result:
The game freezes whenever the in-game map is opened.

Expected result:
The map should open normally.

Comparison:

Kernel 6.12.100 with Wayland: freezes with Proton 10 and Proton 11.
Kernel 6.12.100 with X11: works correctly.
Kernel 6.12.96 with Wayland: works correctly with Proton 11.

The same hardware, userspace, NVIDIA driver and game installation were used. 
Changing only the kernel from 6.12.100 to 6.12.96 resolves the problem.

Kernel 6.12.100 has since been removed because kernel 6.12.96 is required as 
the working kernel. The system information below therefore shows the currently 
running 6.12.96 kernel.

Additional system information:
ronald@debian:~$ uname -a
dpkg -l 'linux-image-*' | grep '^ii'
dpkg-query -W nvidia-driver
plasmashell --version
kwin_wayland --version]
Linux debian 6.12.96+deb13-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.96-1 
(2026-07-20) x86_64 GNU/Linux
ii  linux-image-6.12.95+deb13-amd64           6.12.95-1    amd64        Linux 
6.12 for 64-bit PCs (signed)
ii  linux-image-6.12.96+deb13-amd64           6.12.96-1    amd64        Linux 
6.12 for 64-bit PCs (signed)
nvidia-driver   550.163.01-4~bpo13+1
plasmashell 6.3.6
QThreadStorage: Thread 0x55657d4c02b0 exited after QThreadStorage 8 destroyed
QThreadStorage: Thread 0x55657d4c02b0 exited after QThreadStorage 3 destroyed
QThreadStorage: Thread 0x55657d4c02b0 exited after QThreadStorage 2 destroyed
kwin: Onbekende optie: 'version]'.
QThreadStorage: Thread 0x55c23ab334c0 exited after QThreadStorage 8 destroyed
QThreadStorage: Thread 0x55c23ab334c0 exited after QThreadStorage 1 destroyed
QThreadStorage: Thread 0x55c23ab334c0 exited after QThreadStorage 0 destroyed

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Thread

Bug#1143255: Bug in kernel 6.12.100 Ronald Blijlevens <ronald.blijlevens@gmail.com> - 2026-08-01 18:50 +0200
  Processed: Re: Bug#1143255: Bug in kernel 6.12.100 "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-08-01 22:20 +0200
  Bug#1143255: Bug in kernel 6.12.100 Salvatore Bonaccorso <carnil@debian.org> - 2026-08-01 22:20 +0200

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