I also confirm the screen flickering issue after wake from suspend. After resuming, the external monitor appears to refresh only when there is screen activity. If the screen is static, with no animations and no mouse movement, the display becomes completely black, as if nothing is being refreshed.
When there is activity, for example moving the mouse cursor or triggering a redraw, the image reappears but flickers continuously while updates are happening. Once activity stops, the screen goes black again. The workaround I use is turning the external monitor off and on. System details: Ubuntu 24.04.3 LTS on a Dell Precision 3591 Linux Kernel 6.14.0-37-generic External monitor connected via DisplayPort through a Dell Thunderbolt 4 Dock -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2109692 Title: Failed automatic external monitor detection via Thunderbolt dock To manage notifications about this bug go to: https://bugs.launchpad.net/dell/+bug/2109692/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
