sorry , it was due to my poor tech knowledge


** Attachment added: "lspcik.txt"
   https://bugs.launchpad.net/bugs/1891470/+attachment/5402086/+files/lspcik.txt

** Attachment added: "packages.txt"
   
https://bugs.launchpad.net/bugs/1891470/+attachment/5402087/+files/packages.txt

** Attachment added: "prevboot.txt"
   
https://bugs.launchpad.net/bugs/1891470/+attachment/5402088/+files/prevboot.txt

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https://bugs.launchpad.net/bugs/1891470

Title:
  [amdgpu] White screen on resume from suspend

Status in linux package in Ubuntu:
  Incomplete
Status in mutter package in Ubuntu:
  Incomplete

Bug description:
  The PC usually shows a Butter milk like screen when it wakes up from 
suspension.my laptop is set to lid close to undergo suspension.when I open the 
lid a paper white or Butter milk screen is shown.the only solution is to force 
power of by long pressing power button. this issue is also observed when the 
Ubuntu 20.04 OS starts.My PC is in dual boot. I play videos from Windows then 
shutdown Windows.On the next boot I select Ubuntu from boot options.At that 
time some texts are shown and after a couple of seconds this Butter milk like 
screen could be observed.It maybe graphics issue.
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.11-0ubuntu27.6
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  DistroRelease: Ubuntu 20.04
  InstallationDate: Installed on 2020-06-20 (54 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  Package: mutter 3.36.3-0ubuntu0.20.04.1
  PackageArchitecture: amd64
  ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
  Tags: third-party-packages focal wayland-session
  Uname: Linux 5.4.0-42-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip input lpadmin lxd plugdev sambashare sudo video
  _MarkForUpload: True

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