https://bugs.freedesktop.org/show_bug.cgi?id=69723
--- Comment #91 from Alex Deucher agd5f@yahoo.com --- (In reply to comment #88)
Forget that... locked as always.
I'll test 3.14 soon, either from Alex's drm-next or when we'll get 3.14-rc1...
Have you tried disabling hyperz globally rather than just for a specific app? E.g., set env var R600_DEBUG=nohyperz in /etc/environment or however your distro handles global env vars.