So far the settings above seem to have resolved flickering for me… and I’m good with that. The more I dig into wayland, the more little niggles/growing-pains I see that need to be considered.
So from this point forward, I’d like to focus on the initial issue… dGPU port has issues when I try connect my DP monitor to it.
- Within an x11 session, it’s output appears to be forced to the left and working within an invisible box equal to the DP monitor width (the dimensions of the monitor connected to it)… move the game to the right, and it stops rendering at the right edge of that invisible box. When my DP monitor was on the left this worked out… but once I moved the DP monitor to the right, forcing left was revealed, and is a problem (in X11).
- Within a Wayland session it appears that steam games (run via proton) load blank/black. based on the journal entries provided, this starts with a
kwin_wayland_drmerror immediately when a connection is made on the dGPU port, after you launch a game that loads blank, the journal fills with additionalkwin_wayland_drmanddrm:amdgpu_dm_plane_helper_prepare_fb [amdgpu]messages.
Regardless of which session is launched, the issue can be worked-around by moving the DP cannection to the side iGPU port… which is not a solution to using the dGPU port directly and suffers (based on what I read) a 10% performance hit.