Public bug reported:
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)
** Affects: linux-signed-hwe-6.8 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug jammy
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You received this bug notification because you are a member of Kernel
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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:
New
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)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-6.8/+bug/2077405/+subscriptions
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