Comment # 13 on bug 92836 from Vedran Miletić

David, can you try newer kernel? I get the same errors with Fedora kernel 4.5.4
on

01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Tonga XT / Amethyst XT [Radeon R9 380X / R9 M295X] [1002:6938] (rev
f1)

but the errors are non-fatal, i.e. there is graphics corruption but no hangs.
Restarting X removes graphics corruption.