I've attached the dmesg output from both 6.4 (non-working), and 6.1 (working); as well as the hwinfo output from 6.1. Apologies for making this two comments. One thing I noticed is that in the *working* dmesg output, the following line appears four times: [drm:dm_plane_helper_prepare_fb [amdgpu]] *ERROR* Failed to pin framebuffer with error -12 I have not yet tried the kernel from Leap 15.4. I'll update here when I do.