[Bug 1870791] [NEW] Graphics flicker after sleep mode

[Johandrex]

Public bug reported:

After choosing to go into sleep mode the notifications sent a message saying
[KWin Window Manager] "Desktop effects were restarted due to a graphic reset"

As you can see in the screenshot I sent in, the desktop menu is
unreadable with black text, the user avatar can't be viewed and all
programs windows bars are flickering from blue to the desktop icons. The
windows bars are usually white.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: kwin (not installed)
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu22
Architecture: amd64
CurrentDesktop: KDE
Date: Sat Apr  4 16:07:11 2020
InstallationDate: Installed on 2020-04-04 (0 days ago)
InstallationMedia: Kubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200401)
SourcePackage: kwin
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: kwin (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal

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https://bugs.launchpad.net/bugs/1870791

Title:
  Graphics flicker after sleep mode

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