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Bug#1123985: It seems a keymap issue

Cross-posted to 2 groups.

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Hi Martin,

On Fri, Dec 26, 2025 at 10:36:53AM +0000, Martin Herren wrote:
> Hello,
> 
> After further testing I can boot both 6.17.12 and 6.17.13 kernels by
> typing the passphrase as on a US keyboard layout.
> 
> With the 6.17.11 and previous kernels I can type it with my usual
> Swiss French keyboard layout.

This is quite odd, and initially I suspected a change outside of the
kernel. But would you be open to do a bisect experiment? But before
diving into it, might you please as well install 6.18.2-1~exp1 from
experimental and verify if the problem persists? There won't be any
updates in the 6.17.y series. 

If the problem persists in 6.18.2 then we might start with the bisect
experiment in the 6.17.y series.

This would involve compiling and testing a couple of kernels, and the
first step would indicate already if we would be still on the right
track.

    git clone --single-branch -b linux-6.17.y https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
    cd linux-stable
    git checkout v6.17.11
    cp /boot/config-$(uname -r) .config
    yes '' | make localmodconfig
    make savedefconfig
    mv defconfig arch/x86/configs/my_defconfig

    # test 6.17.11 to ensure this is "good"
    make my_defconfig
    make -j $(nproc) bindeb-pkg
    ... install the resulting .deb package and confirm it the problem does not exist.

    This is actually an intersting step, I would be interested to see
    if any surrounding changes did influence that it does not work
    anymore with 6.17.11.

    # test 6.17.12 to ensure this is "bad"
    git checkout v6.17.12
    make my_defconfig
    make -j $(nproc) bindeb-pkg
    ... install the resulting .deb package and confirm the problem exists.

Now if and only if that is confirmed, the bisection can start:

    git bisect start
    git bisect good v6.17.11
    git bisect bad v6.17.12

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, try to boot / 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

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Bug#1123985: linux-image-6.17.12+deb14-amd64: LUKS passphrase never matches on 6.17.12 and 6.17.13. Works fine on 6.17.11. Martin Herren <sputnik@on-the-web.ch> - 2025-12-25 16:40 +0100
  Bug#1123985: It seems a keymap issue Martin Herren <sputnik@on-the-web.ch> - 2025-12-26 12:10 +0100
    Bug#1123985: It seems a keymap issue Salvatore Bonaccorso <carnil@debian.org> - 2025-12-26 18:10 +0100
      Bug#1123985: It seems a keymap issue Martin Herren <sputnik@on-the-web.ch> - 2025-12-26 20:10 +0100
  Bug#1123985: marked as done (linux-image-6.17.12+deb14-amd64:  LUKS passphrase never matches on 6.17.12 and 6.17.13. Works fine on  6.17.11.) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-12-26 20:50 +0100

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