You have been subscribed to a public bug:
After letting the displays timeout and go to sleep, external displays
have a white layer between the windows and the mouse. It's still
possible to interact with the windows below this layer, but it's not
possible to see what's happening without moving them to a display that
doesn't have this glitch.
This occurs in both x11 and wayland sessions, and it's new on noble
(didn't see it on mantic, including with the backports ppa).
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: kwin-wayland 4:5.27.10-0ubuntu1
ProcVersionSignature: Ubuntu 6.6.0-14.14-generic 6.6.3
Uname: Linux 6.6.0-14-generic x86_64
ApportVersion: 2.27.0-0ubuntu6
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: KDE
Date: Mon Feb 5 11:41:37 2024
InstallationDate: Installed on 2023-10-23 (106 days ago)
InstallationMedia: Kubuntu 23.10 "Mantic Minotaur" - Release amd64 (20231010)
SourcePackage: kwin
UpgradeStatus: Upgraded to noble on 2024-01-26 (10 days ago)
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble third-party-packages wayland-session
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External displays go white after a display sleep
https://bugs.launchpad.net/bugs/2052452
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