https://bugs.freedesktop.org/show_bug.cgi?id=99881
--- Comment #5 from Matthew Fox matthew@tech3.me ---
What does
env | grep DRI_
say?
That printed nothing.
My session with runtime pm enabled (no radeon.runpm=0 in cmdline) had been running for a couple of hours without problem (apart from a bit of freezing at the start). However, just after running that command, some new radeon errors appeared in dmesg that I haven't seen before. I think they were ring test failures. The PC has locked up now anyway so I can only hard shut it down. I was switching ttys with CTRL+ALT at the same time which might have caused it.