I have a Radeon 5700 XT and Ryzen 3900X as well. My symptoms are a bit different though. I'm running 2 identical monitors at 2560x1440 120Hz. Flickering affects both monitors simultaneously. As in they flicker at exactly the same time. Often related to how much is changing on the screen. They normally start flickering right after login, even off a fresh boot. People are discussing this over at https://bbs.archlinux.org/viewtopic.php?id=253272 and they say it is solved by kernel 5.4, but I am on linux-image-5.4.0-42-generic and it still flickers.
Running this does stop the flickering for me: xrandr --output DisplayPort-1 --mode 1024x768; sleep 1; xrandr --output DisplayPort-1 --mode 2560x1440 -r 120 Interestingly I only have to run it for one monitor, not both and it stops the flickering for both. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1874588 Title: Flickering screen after waking up from Suspend To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1874588/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
