Comment #7 shows the wrong driver in use - it's using software rendering on the CPU instead of using the GPU. I cannot figure out why yet, but generally recommend you use long term support release 22.04 instead:
https://ubuntu.com/download/desktop ** Changed in: linux-hwe-5.13 (Ubuntu) Status: Incomplete => New ** Also affects: xorg-server (Ubuntu) Importance: Undecided Status: New ** Summary changed: - Screen flickering whe update images + [focal] Screen flickering in Xorg on i7-1165G7 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-hwe-5.13 in Ubuntu. https://bugs.launchpad.net/bugs/2023927 Title: [focal] Screen flickering in Xorg on i7-1165G7 Status in linux-hwe-5.13 package in Ubuntu: New Status in xorg-server package in Ubuntu: New Bug description: Often, when there are small changes in image displayed, an horizontal flickering is observed. This happen for example on a mouse right button menu, or when a hyperlink description appears on the screen bottom when mouse pointer cross some field on a webpage, also when favorites menu appear. The flickering usually disappear in a few moments, sometimes (usually when a few pixels are updating) it can last for seconds. This flickering is caused by a late updating of some horizontal lines, so for awhile a few lines of previous image coexist with a majority of new ones ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: xorg 1:7.7+19ubuntu14 ProcVersionSignature: Ubuntu 5.13.0-41.46~20.04.1-generic 5.13.19 Uname: Linux 5.13.0-41-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.23 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CasperMD5CheckResult: skip CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Wed Jun 14 22:44:12 2023 DistUpgraded: Fresh install DistroCodename: focal DistroVariant: ubuntu DkmsStatus: virtualbox, 6.1.32, 5.13.0-40-generic, x86_64: installed virtualbox, 6.1.32, 5.13.0-41-generic, x86_64: installed virtualbox, 6.1.32, 5.4.0-126-generic, x86_64: installed ExtraDebuggingInterest: Yes, including running git bisection searches GraphicsCard: Intel Corporation Device [8086:9a49] (rev 01) (prog-if 00 [VGA controller]) Subsystem: Device [1e39:a025] InstallationDate: Installed on 2022-01-01 (529 days ago) InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819) Lsusb: Error: command ['lsusb'] failed with exit code 127: lsusb: symbol lookup error: lsusb: undefined symbol: libusb_error_name Lsusb-t: Error: command ['lsusb', '-t'] failed with exit code 127: lsusb: symbol lookup error: lsusb: undefined symbol: libusb_error_name Lsusb-v: Error: command ['lsusb', '-v'] failed with exit code 127: lsusb: symbol lookup error: lsusb: undefined symbol: libusb_error_name MachineType: MEDION S15449 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.13.0-41-generic root=UUID=cbfc0023-baf3-4a11-b0aa-6dadbd0f60f7 ro quiet splash pci=noaer vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/09/2021 dmi.bios.release: 5.19 dmi.bios.vendor: American Megatrends International, LLC. dmi.bios.version: 212 dmi.board.asset.tag: Default string dmi.board.name: M15T dmi.board.vendor: MEDION dmi.board.version: Default string dmi.chassis.asset.tag: Default string dmi.chassis.type: 10 dmi.chassis.vendor: MEDION dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInternational,LLC.:bvr212:bd04/09/2021:br5.19:svnMEDION:pnS15449:pvrDefaultstring:rvnMEDION:rnM15T:rvrDefaultstring:cvnMEDION:ct10:cvrDefaultstring:skuML-23000830031014: dmi.product.family: Akoya dmi.product.name: S15449 dmi.product.sku: ML-230008 30031014 dmi.product.version: Default string dmi.sys.vendor: MEDION version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.107-8ubuntu1~20.04.2 version.libgl1-mesa-dri: libgl1-mesa-dri 21.2.6-0ubuntu0.1~20.04.2 version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core 2:1.20.13-1ubuntu1~20.04.2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A 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/linux-hwe-5.13/+bug/2023927/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
