Hi, finally found this list, I hope it's the right place for this. I recently swapped my trusty RX 6900 XT with a shiny new RX 9070 XT (aka RDNA2 to 4). Now, when I start kwin_wayland my desktop is a flickering mess. As a workaround I can set KWIN_DRM_NO_AMS, it is working with this. Afaik this disables the use of atomic mode setting. So I guess there is a bug in either amdgpu kernel side, libdrm or mesa.
Versions are kernel 6.15-rc2 + drm-fixes-6.15, libdrm is from git (2.4.124 fdf384d4), mesa is 25.1-rc and kwin is 6.3.4. I am happy to provide debug, but I need some guidance to it. Regards Malte
