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Bug#1101203: linux-image-6.12.19-amd64: Kernel 6.12.19-amd64 fails to connect display to X server

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Hi,

In bug discussions, please always reply-all, don't just reply to the
sender.

I have another question below.

On Thu, 2025-03-27 at 19:58 +0100, @ wrote:
> On 27/03/2025 01:42, Ben Hutchings wrote:
> > Control: tag -1 moreinfo
> > 
> > On Mon, 24 Mar 2025 21:44:25 +0100 Joe<shannyodo@yahoo.fr> wrote:
> > [...]
> > > I can't provide kernel log with the reportbug program due to how
> > sudoer is set, I usually use pkexec or su . I there another way to
> > transmit the logs if that's useful ?
> > > Let me know if you need more informations.
> > Please send the kernel log as an attachment.
> > 
> > Also send the kernel log from the working kernel version.
> > 
> > Ben.
> > 
> Here's the dmesg outputs for 6.12.19 & 6.12.17 .
> 
> I have no idea what's wrong, good luck and thank you.

There's an obvious difference in the logs, which is that we have a lot
of messages from the amdgpu driver on 6.12.17 and *none* on 6.12.19. 
That implies it isn't even being loaded, and the device information in
your initial bug report agrees with that.  (The GPU is at PCI address
0000:2d:00.0 and no driver is listed as bound to it.)

I can't see any changes between these versions that would explain this.
But this does look similar to <https://bugs.debian.org/1094767>.  (We
still don't know what actually triggered that but it wasn't a kernel
change.)

Please send the output of the command:

   grep -r amdgpu /etc/modprobe.*

Ben.

-- 
Ben Hutchings
If at first you don't succeed, you're doing about average.

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Bug#1101203: linux-image-6.12.19-amd64: Kernel 6.12.19-amd64 fails to connect display to X server Joe <shannyodo@yahoo.fr> - 2025-03-24 21:50 +0100
  Bug#1101203: linux-image-6.12.19-amd64: Kernel 6.12.19-amd64 fails to connect display to X server Ben Hutchings <ben@decadent.org.uk> - 2025-03-27 01:50 +0100
  Processed: Re: linux-image-6.12.19-amd64: Kernel 6.12.19-amd64  fails to connect display to X server "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-03-27 01:50 +0100
  Bug#1101203: linux-image-6.12.19-amd64: Kernel 6.12.19-amd64 fails to connect display to X server Ben Hutchings <ben@decadent.org.uk> - 2025-03-28 01:10 +0100
  Bug#1101203: linux-image-6.12.19-amd64: Kernel 6.12.19-amd64 fails to connect display to X server Ben Hutchings <ben@decadent.org.uk> - 2025-04-09 16:50 +0200

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