Bug ID: 199319
Summary: Flickering screen on AMDGPU and DC with Linux 4.16-2
Kernel Version: Linux 4.16
Component: Video(DRI - non Intel)
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
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.
* 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
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