I also have this issue on a Thinkpad T14s, AMD Ryzen 7 PRO 4750U. The issue is not present with kernels 5.9.10 or 5.15.23. It is present with the default kernel from the most recent KDE Neon (5.13).
Here's a short video, it's the same pattern (static and vertical lines on the right) as the other video in this thread: https://twitter.com/tlhunter/status/1493107390731874305 The pattern is reminiscent to an HDMI desync issue but the vertical lines do make it distinct. It appeared to affect the laptop screen but not an external display. The static appeared after the screen went to sleep and woke back up, though I don't believe the system went to sleep. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1958591 Title: [amdgpu] Random noise 'static' display after internal display turned off/on To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-hwe-5.13/+bug/1958591/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
