Hello, I was affected by the same bug as you following the Linux 5.8.0-49-generic kernel update (everything is ok with the 5.8.0-48-generic kernel)
However, the problem has been solved with the X.org update which has been available for a few hours. Can you look for new updates available and test after updating the X.org server and restarting the PC? My PC : - Dell Inc. Inspiron 3847/088DT1, BIOS A11 05/07/2019 - EFI v2.31 by American Megatrends - Secure boot disable - CPU : Intel(R) Core(TM) i3-4150 CPU @ 3.50GHz - GPU : Intel Corporation 4th Generation Core Processor Family Integrated Graphics Controller (rev 06) - A single screen connected via HDMI. Resolution: 1920x1080 - RAM : 16 GB DDR3 My Ubuntu 20.10 : - Linux 5.8.0-49-generic #55-Ubuntu SMP Wed Mar 24 14:45:45 UTC 2021 - X11 - GNOME 3.38.2 - French language -- 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/1923632 Title: Screen flickering Status in xorg package in Ubuntu: Confirmed Bug description: ubuntu whole screen flickering. ProblemType: Bug DistroRelease: Ubuntu 20.10 Package: xorg 1:7.7+19ubuntu15 ProcVersionSignature: Ubuntu 5.8.0-49.55-generic 5.8.18 Uname: Linux 5.8.0-49-generic x86_64 ApportVersion: 2.20.11-0ubuntu50.5 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CasperMD5CheckResult: skip CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Tue Apr 13 20:36:04 2021 DistUpgraded: Fresh install DistroCodename: groovy DistroVariant: ubuntu GraphicsCard: Intel Corporation 4th Generation Core Processor Family Integrated Graphics Controller [8086:041e] (rev 06) (prog-if 00 [VGA controller]) Subsystem: Micro-Star International Co., Ltd. [MSI] 4th Generation Core Processor Family Integrated Graphics Controller [1462:7817] InstallationDate: Installed on 2021-04-13 (0 days ago) InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022) MachineType: MSI MS-7817 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.8.0-49-generic root=UUID=03a76041-a4c2-4e9f-a936-29041654a888 ro quiet splash vt.handoff=7 SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/21/2015 dmi.bios.release: 4.6 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: V6.7 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: H81M-E33 (MS-7817) dmi.board.vendor: MSI dmi.board.version: 1.0 dmi.chassis.asset.tag: To be filled by O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: MSI dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV6.7:bd04/21/2015:br4.6:svnMSI:pnMS-7817:pvr1.0:rvnMSI:rnH81M-E33(MS-7817):rvr1.0:cvnMSI:ct3:cvr1.0: dmi.product.family: To be filled by O.E.M. dmi.product.name: MS-7817 dmi.product.sku: To be filled by O.E.M. dmi.product.version: 1.0 dmi.sys.vendor: MSI version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.102-1ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 20.2.6-0ubuntu0.20.10.1 version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core 2:1.20.9-2ubuntu1.1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1ubuntu1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200714-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1923632/+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