** Summary changed: - Extreme Screen flickering when non native resolution + Extreme Screen flickering when setting a non-native resolution
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1958538 Title: Extreme Screen flickering when setting a non-native resolution Status in xorg package in Ubuntu: New Bug description: As soon I set the screen resolution to non native (4k laptop display) the screen begins to flicker and horizontal/vertical lines appear. (See attached image) Interestingly this happens only to the internal screen, external monitors work fine. Also during boot (supposedly when the display driver is loaded) severe 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 DistroRelease: Ubuntu 21.10 Package: xorg 1:7.7+22ubuntu2 ProcVersionSignature: Ubuntu 5.13.0-27.29-generic 5.13.19 Uname: Linux 5.13.0-27-generic x86_64 ApportVersion: 2.20.11-0ubuntu71 Architecture: amd64 CasperMD5CheckResult: pass CompositorRunning: None Date: Thu Jan 20 15:14:11 2022 DistUpgraded: Fresh install DistroCodename: impish DistroVariant: ubuntu ExtraDebuggingInterest: Yes 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-256color PATH=(custom, no user) LANG=de_CH.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.13.0-27-generic root=UUID=9b2ef1f6-51f0-4f81-a1cd-0e7a073ff58e ro quiet splash vt.handoff=7 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.asset.tag: Not Available dmi.board.name: 20XLS0CJ00 dmi.board.vendor: LENOVO dmi.board.version: Not Defined dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.ec.firmware.release: 1.11 dmi.modalias: dmi:bvnLENOVO:bvrR1MET41W(1.11):bd09/03/2021:br1.11:efr1.11:svnLENOVO:pn20XLS0CJ00:pvrThinkPadT14Gen2a:rvnLENOVO:rn20XLS0CJ00:rvrNotDefined:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20XL_BU_Think_FM_ThinkPadT14Gen2a: dmi.product.family: ThinkPad T14 Gen 2a dmi.product.name: 20XLS0CJ00 dmi.product.sku: LENOVO_MT_20XL_BU_Think_FM_ThinkPad T14 Gen 2a dmi.product.version: ThinkPad T14 Gen 2a dmi.sys.vendor: LENOVO version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.107-8ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 21.2.2-1ubuntu1 version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core 2:1.20.13-1ubuntu1.1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-2build1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200714-1ubuntu2 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-1build1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1958538/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
