Control: tags -1 + moreinfo
On Thu, Feb 19, 2026 at 10:36:57AM +0200, stanislav wrote:
> Package: linux-image-6.12.69+deb13-amd64
> Version: 6.12.69-1
> Severity: important
>
> After upgrading from kernel 6.12.63+deb13-amd64 to 6.12.69+deb13-amd64,
> the system boots to a black screen with no Wayland/KDE Plasma session
> starting.
>
> Hardware: Intel Meteor Lake-P [Intel Arc Graphics] (PCI ID 7d55, rev 08)
> Driver: xe (with force_probe=7d55)
> Desktop: KDE Plasma Wayland (kwin_wayland)
>
> Kernel 6.12.63+deb13-amd64 works correctly with the same configuration.
> Kernel 6.12.69+deb13-amd64 results in a completely black screen after boot.
>
> Kernel parameters:
> xe.enable_psr=0 xe.enable_panel_replay=0 xe.enable_fbc=0
> xe.enable_dc=0 xe.enable_sagv=0 xe.enable_dpt=0 xe.psr_safest_params=1
>
> modprobe.d configuration:
> options xe force_probe=7d55
> blacklist i915
>
> The firmware package firmware-intel-graphics 20250410-2 is installed.
Can you please provide a full kernel log with booting 6.12.69-1 with
the black screens?
Can you please test if the problem persists with 6.12.73-1 as released
via trixie-security?
Additionally, if the issue is still reproducible with 6.12.73-1, can
you please bisect the changes between 6.12.63-1 and 6.12.69-1 to
identify the problem? If you can do that will involve compiling and
testing a few kernels:
git clone --single-branch -b linux-6.12.y
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
cd linux-stable
git checkout v6.12.63
cp /boot/config-$(uname -r) .config
yes '' | make localmodconfig
make savedefconfig
mv defconfig arch/x86/configs/my_defconfig
# test 6.12.63 to ensure this is "good"
make my_defconfig
make -j $(nproc) bindeb-pkg
... install the resulting .deb package and confirm the problem does not
exist
# test 6.12.69 to ensure this is "bad"
git checkout v6.12.69
make my_defconfig
make -j $(nproc) bindeb-pkg
... install the resulting .deb package and confirm problem exists.
With that confirmed, the bisection can start:
git bisect start
git bisect good v6.12.63
git bisect bad v6.12.69
In each bisection step git checks out a state between the oldest
known-bad and the newest known-good commit. In each step test using:
make my_defconfig
make -j $(nproc) bindeb-pkg
... install, verify if problem exists
and if the problem is hit run:
git bisect bad
and if the problem doesn't trigger run:
git bisect good
. Please pay attention to always select the just built kernel for
booting, it won't always be the default kernel picked up by grub.
Iterate until git announces to have identified the first bad commit.
Then provide the output of
git bisect log
In the course of the bisection you might have to uninstall previous
kernels again to not exhaust the disk space in /boot. Also in the end
uninstall all self-built kernels again.
Regards,
Salvatore
