** Attachment added: "Dmesg for 5.8.0-59"
   
https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.11/+bug/1943370/+attachment/5524706/+files/dmesg-Kernel-5.8.0-59-generic-20210626.txt

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https://bugs.launchpad.net/bugs/1943370

Title:
  i915 screen flicker

Status in linux-signed-hwe-5.11 package in Ubuntu:
  New

Bug description:
  The screen flicker started while booting into kernel image 5.8.0-63
  and seems to happen on all the newer images.  Image 5.8.0-55 doesn't
  flicker, and this is what is currently used.

  Bug #1939296 is similar, but the GPU hang is not in my dmesg output
  and versions before 5.8.0-55 all seem to work for me.

  The kernel code is big and I'm fairly new to it, but I did a git
  revert on c6f8062265d1529c3ce4cc18b9dc59fb73bcca0f, but had trouble
  trying to compile.

  https://kernel.ubuntu.com/git/ubuntu/ubuntu-
  focal.git/commit/?h=hwe-5.8&id=c6f8062265d1529c3ce4cc18b9dc59fb73bcca0f

  $ lsb_release -rd
  Description:  Ubuntu 20.04.3 LTS
  Release:      20.04

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: linux-image-5.11.0-34-generic 5.11.0-34.36~20.04.1
  ProcVersionSignature: Ubuntu 5.11.0-34.36~20.04.1-generic 5.11.22
  Uname: Linux 5.11.0-34-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.11-0ubuntu27.18
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Sep 12 08:09:25 2021
  InstallationDate: Installed on 2020-07-03 (436 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: linux-signed-hwe-5.11
  UpgradeStatus: No upgrade log present (probably fresh install)

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