You have been subscribed to a public bug:
Similar to https://answers.launchpad.net/ubuntu/+question/703200, but this
happening on Ubuntu 25.10 after upgrade from 25.04.
Brightness control for the internal monitor work before plugging in the
external monitor.
After unplugging the external monitor, the brightness controls still appear, as
well as the indicator for brightness changes, but brightness for the internal
monitor remains unchanged.
ProblemType: Bug
DistroRelease: Ubuntu 25.10
Package: xorg (not installed)
ProcVersionSignature: Ubuntu 6.16.0-16.16-generic 6.16.0
Uname: Linux 6.16.0-16-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.33.1-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Tue Aug 26 10:47:38 2025
InstallationDate: Installed on 2023-11-21 (644 days ago)
InstallationMedia: Ubuntu 23.10.1 "Mantic Minotaur" - Release amd64 (20231016.1)
ProcEnviron:
LANG=fr_FR.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to questing on 2025-08-23 (3 days ago)
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug questing wayland-session
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Brightness control not working for laptop internal monitor after unplugging
external monitor
https://bugs.launchpad.net/bugs/2121431
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seeded packages, which is subscribed to xorg in Ubuntu.
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