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Bug#1131626: linux-image-6.12.74+deb13+1-amd64: Hung thread leading to panic on removing amdgpu module

Cross-posted to 2 groups.

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Control: forcemerge 1130930 -1

Hi,

On Mon, Mar 23, 2026 at 03:20:44PM +0800, James French wrote:
> Package: src:linux
> Version: 6.12.74-2
> Severity: important
> X-Debbugs-Cc: james@french.id.au
> 
> Dear Maintainer,
> 
> Removing the amdgpu module after previously disconnecting the framebuffer results in a repeatable hung CPU and eventual kernel panic on kernels 6.12.74 and the previous security release 6.12.73. This worked in Bookworm and has worked in Trixie - Kernels 6.12.63 and earlier were not affected.
> 
> >From the attached journal, this appears to be an issue with the amdgpu module failing to properly release the hardware.
> 
> This bug breaks single GPU passthrough to a VM where the host may also use the card when it is not in use. Booting with amdgpu.dc=0,or with amdgpu blacklisted are workarounds, but do not allow the host to use the GPU when the guest is not in use.
> 
> I have seen this behaviour on three systems with an RX 6000 and RX 7000 series cards.

This should be the same as the already reported #1130930, merging
both. It will be fixed with the next upload for trixie.

But if you can, test the mentioned commit on top of 6.12.74-1 to
confirm, would be great!

Regards,
Salvatore

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Bug#1131626: linux-image-6.12.74+deb13+1-amd64: Hung thread leading to panic on removing amdgpu module Salvatore Bonaccorso <carnil@debian.org> - 2026-03-23 19:50 +0100
  Processed: Re: Bug#1131626: linux-image-6.12.74+deb13+1-amd64:  Hung thread leading to panic on removing amdgpu module "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-03-23 19:50 +0100

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