https://bugs.freedesktop.org/show_bug.cgi?id=108781
--- Comment #19 from Jim Haddad jimhaddad46@gmail.com --- This happened to me 7 days ago when Fedora replaced kernel-4.18.18-300.fc29 with kernel-4.19.2-300.fc29. Also on kernel-4.19.3-300.fc29 from yesterday. On a different hard drive I tried rawhide and kernel-4.20.0-0.rc3.git1.1.fc30. Same thing. I have also been using radeon.cik_support=0 amdgpu.cik_support=1 amdgpu.dpm=1 amdgpu.dc=1 because it crashes without it. Removing amdgpu.dpm=1 didn't fix this. Removing all of these didn't fix this. I have a Sapphire R9 290. Fedora says downgrading the kernel isn't supported but downgrading to kernel-4.18.18-300.fc29 seems to work.