*** This bug is a duplicate of bug 2062951 ***
https://bugs.launchpad.net/bugs/2062951
The description provided by the initial post of #2062951 (flickering
when moving the mouse) does not agree with my observations, neither does
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/comments/10,
so I cannot confirm that this is the same issue.
Also there seems to be no mention of point b), which I described in my
initial report, in #2062951.
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https://bugs.launchpad.net/bugs/2077405
Title:
External screen flashing and cannot use after laptop lid closed
Status in linux 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)
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu82.6
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: oligri 1236 F.... pulseaudio
CRDA: N/A
CasperMD5CheckResult: pass
CurrentDesktop: XFCE
DistroRelease: Ubuntu 22.04
InstallationDate: Installed on 2024-08-05 (27 days ago)
InstallationMedia: Xubuntu 22.04.4 LTS "Jammy Jellyfish" - Release amd64
(20240216.1)
MachineType: LENOVO 20S0007LMX
Package: linux (not installed)
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.8.0-40-generic
root=/dev/mapper/vgxubuntu-root ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 6.8.0-40.40~22.04.3-generic 6.8.12
RelatedPackageVersions:
linux-restricted-modules-6.8.0-40-generic N/A
linux-backports-modules-6.8.0-40-generic N/A
linux-firmware 20220329.git681281e4-0ubuntu3.31
Tags: jammy
Uname: Linux 6.8.0-40-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 08/26/2020
dmi.bios.release: 1.13
dmi.bios.vendor: LENOVO
dmi.bios.version: N2XET23W (1.13 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20S0007LMX
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.7
dmi.modalias:
dmi:bvnLENOVO:bvrN2XET23W(1.13):bd08/26/2020:br1.13:efr1.7:svnLENOVO:pn20S0007LMX:pvrThinkPadT14Gen1:rvnLENOVO:rn20S0007LMX:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20S0_BU_Think_FM_ThinkPadT14Gen1:
dmi.product.family: ThinkPad T14 Gen 1
dmi.product.name: 20S0007LMX
dmi.product.sku: LENOVO_MT_20S0_BU_Think_FM_ThinkPad T14 Gen 1
dmi.product.version: ThinkPad T14 Gen 1
dmi.sys.vendor: LENOVO
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