As soon I set the screen resolution to non native (4k laptop display) the screen begins to flicker and horizontal/vertical lines appear. Interestingly this happens only to the internal screen, external monitors work fine.
Also during boot (supposedly when the display driver is loaded) severer tearing is visible for brief moment.
An issue with the screen itself can be ruled out since there are no issues when running ubuntu 20.04.
As soon I set the screen resolution to non native (4k laptop display) the screen begins to flicker and horizontal/vertical lines appear. Interestingly this happens only to the internal screen, external monitors work fine.
Also during boot (supposedly when the display driver is loaded) severer tearing is visible for brief moment.
An issue with the screen itself can be ruled out since there are no issues when running ubuntu 20.04.
ProblemType: Bug ature: Ubuntu 5.13.0- 27.29-generic 5.13.19 esult: pass nterest: Yes 256color /vmlinuz- 5.13.0- 27-generic root=UUID= 9b2ef1f6- 51f0-4f81- a1cd-0e7a073ff5 8e ro quiet splash vt.handoff=7 asset.tag: Not Available asset.tag: No Asset Information version: None firmware. release: 1.11 bvrR1MET41W( 1.11):bd09/ 03/2021: br1.11: efr1.11: svnLENOVO: pn20XLS0CJ00: pvrThinkPadT14G en2a:rvnLENOVO: rn20XLS0CJ00: rvrNotDefined: cvnLENOVO: ct10:cvrNone: skuLENOVO_ MT_20XL_ BU_Think_ FM_ThinkPadT14G en2a: MT_20XL_ BU_Think_ FM_ThinkPad T14 Gen 2a version: ThinkPad T14 Gen 2a libgl1- mesa-dri: libgl1-mesa-dri 21.2.2-1ubuntu1 libgl1- mesa-glx: libgl1-mesa-glx N/A xserver- xorg-core: xserver-xorg-core 2:1.20. 13-1ubuntu1. 1 xserver- xorg-input- evdev: xserver- xorg-input- evdev N/A xserver- xorg-video- ati: xserver- xorg-video- ati 1:19.1.0-2build1 xserver- xorg-video- intel: xserver- xorg-video- intel 2:2.99. 917+git20200714 -1ubuntu2 xserver- xorg-video- nouveau: xserver- xorg-video- nouveau 1:1.0.17-1build1
DistroRelease: Ubuntu 21.10
Package: xorg 1:7.7+22ubuntu2
ProcVersionSign
Uname: Linux 5.13.0-27-generic x86_64
ApportVersion: 2.20.11-0ubuntu71
Architecture: amd64
CasperMD5CheckR
CompositorRunning: None
Date: Thu Jan 20 15:14:11 2022
DistUpgraded: Fresh install
DistroCodename: impish
DistroVariant: ubuntu
ExtraDebuggingI
GraphicsCard:
Advanced Micro Devices, Inc. [AMD/ATI] Cezanne [1002:1638] (rev d1) (prog-if 00 [VGA controller])
Subsystem: Lenovo Cezanne [17aa:5094]
InstallationDate: Installed on 2022-01-03 (16 days ago)
InstallationMedia: Ubuntu 21.10 "Impish Indri" - Release amd64 (20211012)
MachineType: LENOVO 20XLS0CJ00
ProcEnviron:
LANGUAGE=de_CH:de
TERM=xterm-
PATH=(custom, no user)
LANG=de_CH.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/03/2021
dmi.bios.release: 1.11
dmi.bios.vendor: LENOVO
dmi.bios.version: R1MET41W (1.11 )
dmi.board.
dmi.board.name: 20XLS0CJ00
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.
dmi.ec.
dmi.modalias: dmi:bvnLENOVO:
dmi.product.family: ThinkPad T14 Gen 2a
dmi.product.name: 20XLS0CJ00
dmi.product.sku: LENOVO_
dmi.product.
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.107-8ubuntu1
version.
version.
version.
version.
version.
version.
version.