https://bugs.freedesktop.org/show_bug.cgi?id=110637
--- Comment #8 from Alexander Mezin mezin.alexander@gmail.com --- (In reply to Jan Vesely from comment #6)
if yes can you confirm if the games hang when running with OCL_ICD_VENDORS=/var/empty/ ? (alternatively, you can just move libMesaOpenCL.* out of library path)
No, setting OCL_ICD_VENDORS didn't change anything (though I'm not completely sure that Steam and then Proton don't discard environment variables somewhere).
However, upgrading Mesa to 19.0.4 fixed game hangs. OpenCL issues are still here.