Hello Timo,

would you be so kind to copy all your findings from bugzilla over, here?
This is _the right_ place for drm/radeon/amdgpu driver bugs.

I think Alex would have a look, then (his commit).
Linux Kernel commit : d57c0edfe00d3274b50f91ce3076ed0e82d28782

Greetings,
Dieter