Hi Oliver, thank you for taking the time to open this bug report.
There is not enough information available in this ticket unfortunately
to fully start the investigation, and debugging the issue.
If you could run "apport-collect 2077405" which will collect the logs
and system information, it would allow us to look into this issue.
Thanks.
** Changed in: linux-signed-hwe-6.8 (Ubuntu)
Assignee: (unassigned) => Philip Cox (philcox)
** Changed in: linux-signed-hwe-6.8 (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/2077405
Title:
External screen flashing and cannot use after laptop lid closed
Status in linux-signed-hwe-6.8 package in Ubuntu:
Incomplete
Bug description:
With Kernel 6.8.0-40 (upgraded yesterday)
a) the external screen connected to my Lenovo T14 ThinkPad randomly turns
black for a few seconds and then recovers,
b) the laptop cannot be used after the lid has been closed. The power LED is
lit (no stand-by) but screen is blank. No reaction to any key, also cannot open
a terminal with Ctrl-Alt-Fx. Only a hard reset is possible.
None of these problems occur with Kernel 6.5.0-45.
I have previously attempted to use Ubuntu 24.04 LTS but faced exactly
the same issues, therefore I re-installed Ubuntu 22.04 LTS which was
working stable until yesterdays kernel upgrade.
While working with 24.04 LTS for a few weeks I also noted frequent,
random and complete system freezes which made it unusable with that
laptop.
$ lsb_release -rd
Description: Ubuntu 22.04.4 LTS
Release: 22.04
ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-image-6.8.0-40-generic 6.8.0-40.40~22.04.3
ProcVersionSignature: Ubuntu 6.8.0-40.40~22.04.3-generic 6.8.12
Uname: Linux 6.8.0-40-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.6
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: XFCE
Date: Tue Aug 20 10:27:32 2024
InstallationDate: Installed on 2024-08-05 (14 days ago)
InstallationMedia: Xubuntu 22.04.4 LTS "Jammy Jellyfish" - Release amd64
(20240216.1)
SourcePackage: linux-signed-hwe-6.8
UpgradeStatus: No upgrade log present (probably fresh install)
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