Public bug reported:
My computer is an ASUS A88XM-A with AMD A8-7600 Radeon R7 APU with
Samsung SyncMaster TA350 TV/monitor connected via HDMI. Running Ubuntu
MATE 20.04.3. When the computer goes to sleep and tries to wake, the
display is very dim. I can just see enough to shutdown.
When shutting down, the brightness is normal. When I reboot, the
computer brightness is normal.
Apparently, something is wrong with the wake-up driver code.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.11.0-38-generic 5.11.0-38.42~20.04.1
ProcVersionSignature: Ubuntu 5.11.0-38.42~20.04.1-generic 5.11.22
Uname: Linux 5.11.0-38-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.20
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: MATE
Date: Mon Oct 25 18:42:00 2021
SourcePackage: linux-signed-hwe-5.11
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux-signed-hwe-5.11 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal
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https://bugs.launchpad.net/bugs/1948726
Title:
When Ubuntu MATE 20.04.3 wakes up HDMI display is dim
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