(In reply to Christian König from comment #10)
> Yeah, I enabled more error messages on amd-staging-drm-next.
But it still not enough for understand root cause?

Can you also rebase amd-staging-drm-next to RC5 with enabled KPTI patch? I do
not want to sit on a vulnerable kernel. The default shipped kernel in Fedora
already patched but not having AMD Vega support.