Graphics flicker after sleep mode

[Johandrex]

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)

[Johandrex (johandrex)]

Opened this bug again, I noticed that everything works fine after entering "sleep" manually in the console or menu.

BUT if sleep mode is entered from the system settings in "Suspend session", all the graphics are reset and flickers. See attached image.

[Scarlett Gately Moore (scarlettmoore)]

This bug is very old, if it is still an issue please update the bug with information from a supported release.

[Launchpad Janitor (janitor)]

[Expired for kwin (Ubuntu) because there has been no activity for 60 days.]