https://bugzilla.kernel.org/show_bug.cgi?id=199319
Bug ID: 199319 Summary: Flickering screen on AMDGPU and DC with Linux 4.16-2 Product: Drivers Version: 2.5 Kernel Version: Linux 4.16 Hardware: x86-64 OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: mail@rainer-finke.de Regression: No
Description: I upgraded to Linux 4.16-2 from the Arch Linux testing repository, but since then the screen is flickering with my RX480 and AMDGPU.DC enabled. The flickering is visible especially on Plasma-Wayland as soon as I move the mouse, it is like a bright flickering, not like a graphical corruption. On SDDM or Plasma X11 the flickering is much less frequent, but even there the screen flickers from time to time. I use a 4K display connected via DisplayPort. A downgrade to Linux 4.15 stable solved this even tough AMDGPU.DC is enabled as well. I couldn't reproduce the same issue with my AMD Ryzen 5 2500U Vega APU (1920x1080), so the issue might be related to the RX480 or 4K.
Additional info: * Linux 4.16-2 from Arch Linux testing * AMDGPU.DC=1 (kernel parameter) * 4K display DisplayPort
Steps to reproduce: 1. Ugrade to Linux 4.16.2 with AMDGPU.DC enabled on a RX480 2. Screen is flickering when moving the mouse