Today it didn't work with kernel 6.1 and after several desperate attempts it did work on kernel 6.2. So: - it isn't a deterministic bug - it's build into kernel 6.1 and 6.2 - it has nothing to do with hibernate or suspend (in my case) - it worked with kernel 6.0.x - it seems to have to do with https://gitlab.freedesktop.org/drm/amd/-/issues/2297 HTH, Frerk Meyer