Public bug reported: Thinkpad T14 AMD uses relatively new AMD Ryzen 4000 platform. Screen brightness is fixed at likely the brightest setting and can not be adjusted. Keyboard shortcut keys are working as the brightness icon shows up, but the actual brightness doesn't change.
ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: evince 3.36.7-0ubuntu1 ProcVersionSignature: Ubuntu 5.4.0-47.51-generic 5.4.55 Uname: Linux 5.4.0-47-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.4 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Tue Sep 15 22:13:07 2020 InstallationDate: Installed on 2020-09-16 (0 days ago) InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: evince UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: ubuntu Importance: Undecided Status: New ** Tags: amd64 apport-bug focal -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1895782 Title: Screen brightness adjustment doesn't work on Lenovo Thinkpad T14 AMD gen1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1895782/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs