After more research (including getting different symptoms with kernel 6.8-rc3), this appears to be the amdgpu scatter/gather bug: https://community.frame.work/t/responded-screen-flashing-partially- white-on-framework-13-amd-ubuntu-22-04/40626/2
I've applied the `amdgpu.sg_display=0` kernel command line workaround and will report back. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2052452 Title: External displays go white after a display sleep Status in linux package in Ubuntu: New Bug description: 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) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2052452/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
