Public bug reported:
NOTE: This report has been generated by Perplexity to better structure
my bug report (I am a non-native English speaker)
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Source package:
gnome-control-center (Settings → Keyboard → Add Input Source → Other →
user-defined layout)
Ubuntu release (lsb_release -rd):
Description: Ubuntu 25.10
Release: 25.10
Package version (apt-cache policy gnome-control-center):
Installed: 1:49.0-1ubuntu2
Candidate: 1:49.0-1ubuntu2
----
Description of the issue:
Selecting a user-defined custom keyboard layout in Settings -> Keyboard
triggers an immediate system shutdown. Subsequent boot results in an
"Authentication Error" loop followed by a total UI freeze, locking the
user out.
What I expected to happen:
- Settings should add the selected custom keyboard layout and return to the
Keyboard list without crashing or shutting down the machine.
- After reboot, the login screen should allow me to enter my password normally
and retry if authentication fails.
What happened instead:
- When selecting the user-defined custom keyboard layout, the whole system
immediately crashes and powers off.
- After reboot, entering the correct password shows "Authentication Error"
once, then the login screen freezes completely (cannot retry or go back).
----
Steps to Reproduce:
1. Open Settings -> Keyboard.
2. Click "Add Input Source".
3. Click the three dots -> select "Other".
4. Select a user-defined custom keyboard layout. -> System immediately crashes
and powers off.
5. Turn the computer back on.
6. At the login screen, enter the correct user password.
----
Results:
At Step 5: The computer shuts down instantly (hard crash).
At Step 7: The system displays "Authentication Error", and immediately
after this message, the login screen freezes completely (unable to retry
password or go back).
Severity: Critical (System crash + User lockout).
----
Workaround:
Boot to Recovery Mode (Root Shell) and run:
su - your_username -c "dbus-run-session gsettings reset
org.gnome.desktop.input-sources sources"
----
System:
Distro: Ubuntu 25.10 (Questing Quokka)
Desktop: GNOME 49.0
Kernel: 6.17.0-8-generic x86_64
Machine:
Model: Lenovo ThinkPad P14s Gen 5 AMD (21MECTO1WW)
BIOS/UEFI: R2LET35W (1.16), 2025-07-25
CPU:
AMD Ryzen 7 PRO 8840HS w/ Radeon 780M Graphics (16 threads, Zen 4)
Graphics:
GPU: AMD Radeon 780M (amdgpu)
Display server: Wayland
Compositor: gnome-shell
Resolution: 2560x1600@60Hz
Mesa: 25.2.3-1ubuntu1
Drives / Partitions:
NVMe: 512 GB KIOXIA
Root: LUKS + LVM, ext4 on /dev/dm-1 (ubuntu--vg-ubuntu--lv)
/boot: ext4 on /dev/nvme0n1p2
/boot/efi: vfat on /dev/nvme0n1p1
GNOME / Settings packages:
gnome-shell 49.0-1ubuntu1.2 amd64 graphical
shell for the GNOME desktop
gnome-shell-common 49.0-1ubuntu1.2 all common files
for the GNOME graphical shell
gnome-shell-extension-appindicator 61-2 all
AppIndicator, KStatusNotifierItem and tray support
gnome-shell-extension-desktop-icons-ng 49.0.5-1ubuntu1 all desktop icon
support for GNOME Shell
gnome-shell-extension-ubuntu-dock 102ubuntu1 all Ubuntu Dock
for GNOME Shell
gnome-shell-extension-ubuntu-tiling-assistant 53-0ubuntu1 all Windows-like
snap assist for GNOME Shell
yaru-theme-gnome-shell 25.10.3-0ubuntu1 all Yaru GNOME
Shell desktop theme
gnome-control-center 1:49.0-1ubuntu2 amd64 Settings
(GNOME control center)
gnome-control-center-data 1:49.0-1ubuntu2 all data files
for Settings
gnome-control-center-faces 1:49.0-1ubuntu2 all user face
images for Settings
** Affects: gnome-control-center (Ubuntu)
Importance: Undecided
Status: New
** Tags: crash freeze gnome gnome-control-center input-source keyboard login
settings
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https://bugs.launchpad.net/bugs/2136992
Title:
Critical System Shutdown & Login Freeze via Custom Keyboard Layout in
Settings
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/2136992/+subscriptions
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