Comment # 6 on bug 1047716 from Fabian Vogt

(In reply to P. Otato from comment #5)
> Thanks for the tip Fabian. Uninstalling drm-kmp-default seems to be a valid
> workaround. Marking this as RESOLVED:WORKSFORME since this seems to be a
> regression that has been backported from Linux Kernel 4.9.

IMO it still needs to be looked into by the kernel team, it's installed by
default.