Bug#1116614: gnome-session: Graphical issues since kernel 6.16

[David BERCOT]

Package: gnome-session
Version: 48.0-2
Severity: normal

Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?
   * What exactly did you do (or not do) that was effective (or
     ineffective)?
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   * What outcome did you expect instead?

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Since the arrival of kernel 6.16, when I am connected to my base with my 2
screens, everything works well.

However, when my laptop is alone, I have extremely surprising zoom levels.
Thus, Thunderbird presents the list of folders and emails as if I had set a 50%
(or even less) factor, which makes them almost unreadable, and the other
applications seem, on the contrary, slightly de-zoomed.

If I reconnect my laptop to the base, everything goes back to "normal".

At first, I still had a 6.12 kernel and when I booted on that one, I had no
problem.

Now, I only have 2 versions of 6.16 and therefore no possibility (unless I
reinstall an old kernel) to have a "correct" display without the docking
station.

If I switch to xorg when opening my session, everything is almost normal.


-- System Information:
Debian Release: forky/sid
  APT prefers unstable
  APT policy: (600, 'unstable'), (400, 'testing'), (200, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.16.9+deb14-amd64 (SMP w/12 CPU threads; PREEMPT)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages gnome-session depends on:
ii  adwaita-icon-theme        49.0-1
ii  fonts-cantarell           0.303.1-4
ii  gnome-session-bin         48.0-2
ii  gnome-session-common      48.0-2
ii  gnome-settings-daemon     48.1-2
ii  gnome-shell               48.5-2
ii  xdg-desktop-portal-gnome  49.0-1
ii  xwayland                  2:24.1.8-1

Versions of packages gnome-session recommends:
ii  gnome-session-xsession  48.0-2

Versions of packages gnome-session suggests:
ii  desktop-base   14.0.0~pre2
ii  gnome-keyring  48.0-4

-- no debconf information