https://bugs.freedesktop.org/show_bug.cgi?id=109329
--- Comment #1 from Jan Vesely jv356@scarletmail.rutgers.edu --- (In reply to Fabian Maurer from comment #0)
Created attachment 143077 [details] journalctl log
Running luxmark (OpenCL) freezes the system. Only help is to reboot with REISUB command.
dmesg log (from journalctl) attached.
System: -Arch Linux -AMD Radeon 285 -AMD Radeon R9 200 Series (TONGA, DRM 3.27.0, 4.20.1-arch1-1-ARCH, LLVM 7.0.0) -Mesa 18.3.1
which scene are you trying to run?