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Bug#1143255: Bug in kernel 6.12.100

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  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

#93542 — Bug#1143255: Bug in kernel 6.12.100

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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#93546 — Processed: Re: Bug#1143255: Bug in kernel 6.12.100

Processing control commands:

> tags -1 + moreinfo
Bug #1143255 [src:linux] Bug in kernel 6.12.100
Added tag(s) moreinfo.

-- 
1143255: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1143255
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems

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#93548

Control: tags -1 + moreinfo

Hi Ronald,

On Sat, Aug 01, 2026 at 06:39:04PM +0200, Ronald Blijlevens wrote:
> 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

Thanks for the report. Can you please provide the log form the apt
upgrade to see if there were failures building the nvidia kernel
modules? 

Otherwise we still would need full kernel logs up to when you were
able to trigger the problem attached (means you might want to
reinstall the ugprade again, or you can check the earlier boot from
6.12.100 in the systemd journal and provide that).

Regards,
Salvatore

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