You have been subscribed to a public bug:
gnome-control-center - power - Screen brightness is missing.
also on top bar Screen brightness control appears but does nothing.
the problem does not happen on same PC, different partition with Ubuntu 20.04
ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: gnome-control-center 1:3.37.90-1ubuntu2
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
ApportVersion: 2.20.11-0ubuntu45
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sun Aug 30 19:47:23 2020
ExecutablePath: /usr/bin/gnome-control-center
InstallationDate: Installed on 2020-08-28 (2 days ago)
InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Alpha amd64 (20200826)
SourcePackage: gnome-control-center
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Tags: amd64 apport-bug groovy
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Screen brightness missing
https://bugs.launchpad.net/bugs/1893568
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