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Groups > linux.debian.kernel > #93260

Bug#1141604: linux-image-6.12.94+deb13-amd64: does not detect ScreenPad on ASUS VivoBook

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Hi,

On Tue, Jul 07, 2026 at 07:37:24AM +0200, Ponali wrote:
> Package: src:linux
> Version: 6.12.94-1
> Severity: normal
> Tags: upstream, regression
> X-Debbugs-Cc: ponali2k@gmail.com
> 
> Last known working kernel: 6.12.90-1
> First known broken kernel: 6.12.94-1
> 
> 
> Dear Maintainer,
> 
> I upgraded all my packages through apt, which also upgraded the linux image
> from 6.12.90 to 6.12.94.
> 
> I expected the ScreenPad display to continue to be detected and exposed as a
> DRM output, like on 6.12.90. The ScreenPad being the trackpad with a screen,
> which came with my computer (ASUS VivoBook X532FA_S532FA).
> 
> After upgrading and rebooting, the new kernel caused a regression where the
> display of the ScreenPad fails to get recognized by the kernel. The touchpad
> functionality still works. Usually, the ScreenPad would appear as "HDMI-A-1".
> The DRM connector for it still exists (/sys/class/drm/card0-HDMI-A-1), but
> "status" reports "disabled"
> 
> I could not get the ScreenPad display to be recognized again on the new kernel,
> so I configured GRUB to automatically boot to the 6.12.90 kernel through the
> "Advanced Options". The ScreenPad is recognized on older kernel versions, so I
> am still able to use it (until a new LPE comes around).
> 
> To replicate:
> 1. Boot with 6.12.90. The ScreenPad display is detected as HDMI-A-1.
> 2. Boot with 6.12.94 with the exact same hardware.
> 3. The ScreenPad display is no longer usable.
> 
> 
> My main display is eDP-1 (1920x1080), though it isn't essential. My GPU is an
> integrated Intel iGPU, and the driver used for both screens is i915. I have
> booted to the new kernel for reportbug to get all the information
> automatically, but i will continue to use the old one until the appropriate
> time.

As a first step, please verify if the problem persists in 6.12.95-1 as
released. If yes then proceed with the next paragraph.

Can you please bisect the changes between 6.12.90 and 6.12.94 upstream
please? Doing so will require to compile and testing a couple of
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 v6.12.90
    cp /boot/config-$(uname -r) .config
    yes '' | make localmodconfig
    make savedefconfig
    mv defconfig arch/x86/configs/my_defconfig

    # test 6.12.90 to ensure this is "good"
    make my_defconfig
    make -j $(nproc) bindeb-pkg
    ... install the resulting .deb package and confirm problem does not exist

    # test 6.12.94 to ensure this is "bad"
    git checkout v6.12.94
    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 v6.12.90
    git bisect bad v6.12.94

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.

Thanks already.

Regards,
Salvatore

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Thread

Bug#1141604: linux-image-6.12.94+deb13-amd64: does not detect ScreenPad on ASUS VivoBook Ponali <ponali2k@gmail.com> - 2026-07-07 07:40 +0200
  Bug#1141604: linux-image-6.12.94+deb13-amd64: does not detect ScreenPad on ASUS VivoBook Salvatore Bonaccorso <carnil@debian.org> - 2026-07-07 08:20 +0200
  Processed: Re: Bug#1141604: linux-image-6.12.94+deb13-amd64: does  not detect ScreenPad on ASUS VivoBook "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-07-07 08:20 +0200
  Processed: Re: Bug#1141604: linux-image-6.12.94+deb13-amd64: does  not detect ScreenPad on ASUS VivoBook "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-07-07 08:20 +0200
  Bug#1141604: linux-image-6.12.94+deb13-amd64: does not detect ScreenPad on ASUS VivoBook Ponali <ponali2k@gmail.com> - 2026-07-08 07:30 +0200
    Bug#1141604: linux-image-6.12.94+deb13-amd64: does not detect ScreenPad on ASUS VivoBook Salvatore Bonaccorso <carnil@debian.org> - 2026-07-08 17:00 +0200
  Bug#1141604: linux-image-6.12.94+deb13-amd64: does not detect ScreenPad on ASUS VivoBook Ponali <ponali2k@gmail.com> - 2026-07-08 18:50 +0200
  Bug#1141604: linux-image-6.12.94+deb13-amd64: does not detect ScreenPad on ASUS VivoBook Salvatore Bonaccorso <carnil@debian.org> - 2026-07-09 22:20 +0200
    Bug#1141604: linux-image-6.12.94+deb13-amd64: does not detect ScreenPad on ASUS VivoBook Denis Benato <denis.benato@linux.dev> - 2026-07-10 14:30 +0200
      Bug#1141604: linux-image-6.12.94+deb13-amd64: does not detect ScreenPad on ASUS VivoBook Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> - 2026-07-10 14:40 +0200
        Bug#1141604: linux-image-6.12.94+deb13-amd64: does not detect ScreenPad on ASUS VivoBook Salvatore Bonaccorso <carnil@debian.org> - 2026-07-10 20:50 +0200
          Bug#1141604: linux-image-6.12.94+deb13-amd64: does not detect ScreenPad on ASUS VivoBook Denis Benato <denis.benato@linux.dev> - 2026-07-11 18:50 +0200
            Bug#1141604: linux-image-6.12.94+deb13-amd64: does not detect ScreenPad on ASUS VivoBook Thorsten Leemhuis <regressions@leemhuis.info> - 2026-07-21 16:10 +0200
  Processed: Re: Bug#1141604: linux-image-6.12.94+deb13-amd64: does  not detect ScreenPad on ASUS VivoBook "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-07-09 22:20 +0200
  Bug#1141604: linux-image-6.12.94+deb13-amd64: does not detect ScreenPad on ASUS VivoBook Ponali <ponali2k@gmail.com> - 2026-07-10 19:40 +0200
  Bug#1141604: linux-image-6.12.94+deb13-amd64: does not detect ScreenPad on ASUS VivoBook Ponali <ponali2k@gmail.com> - 2026-07-11 19:50 +0200
    Bug#1141604: Fwd: linux-image-6.12.94+deb13-amd64: does not detect ScreenPad on ASUS VivoBook Ponali <ponali2k@gmail.com> - 2026-07-18 10:40 +0200

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