Control: tags -1 + moreinfo Hi Stanislav,
On Thu, Feb 19, 2026 at 10:02:20AM +0100, Salvatore Bonaccorso wrote: > 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. With this procedure, can you please still bisect the issue so we can identify the breaking commit? Regards, Salvatore
