External monitors are black (connected through USB-C hub)
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux-signed-hwe-5.11 (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned |
Bug Description
After upgrading the kernel from 5.8 to 5.11 (5.11.0-
[ 5.383739] i915 0000:00:02.0: [drm] *ERROR* Link Training Unsuccessful
[ 5.907908] i915 0000:00:02.0: [drm] *ERROR* CPU pipe B FIFO underrun
[ 854.832801] i915 0000:00:02.0: [drm] *ERROR* CPU pipe C FIFO underrun
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-
ProcVersionSign
Uname: Linux 5.11.0-25-generic x86_64
ApportVersion: 2.20.11-
Architecture: amd64
CasperMD5CheckR
CurrentDesktop: ubuntu:GNOME
Date: Mon Aug 9 14:01:47 2021
InstallationDate: Installed on 2020-07-26 (378 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
SourcePackage: linux-signed-
UpgradeStatus: No upgrade log present (probably fresh install)
Status changed to 'Confirmed' because the bug affects multiple users.