I experience the same on my system, RX 7800 XT and Ryzen 5 5600, Ubuntu 26.04 + 1440p + 1080p monitor setup
It comes out faster and more frequently when I hog the CPU, for example with stress --cpu 12 and moving some windows or enabling and disabling night light. Doesn't happen on weston or x11 session, however its mostly sure a kernel regression, as I tested the latest mainline 7.2.6 and Ubuntu's 7.0.0.34 and everything is fine here. The only different thing is the following kernel log line at startup when booting on the buggy kernel [ 16.477207] amdgpu 0000:2d:00.0: [drm] REG_WAIT timeout 1us * 100 tries - dcn32_program_compbuf_size line:148 I also tried my Thinkpad L15 which has an AMD APU Pro 5650u, its still present here but less noticeable even with huge CPU load. Found this on amdgpu drm bugzilla https://gitlab.freedesktop.org/drm/amd/-/work_items/5952 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2169181 Title: Visual background flickering and pixel artifacts after updating to kernel 7.0.0-38 (regression from 7.0.0-34) | Ubuntu 26.04 | AMD Radeon RX 9060 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2169181/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
