Thanks for the suggestion.
I tried the 13.6 beta today, but Brutal Legends still crashed after 20+ minutes. I also had some artifacts (long black bars sticking out of one persons head).
The errors in /var/log/messages are gone. There are also no error messages in Xorg.0.log... So, I have no idea where to look for messages next.
I will just wait for the next Catalyst and hope for the best.
If disabling hyperZ helped you, then you might really be hitting this bug.
Please get lastest MESA/DDX and retest without workarounds. If the bug surfaces, please fire the bug to MESA development list - this is the *only* way as first step in order to make proper driver. I don't have the game, so sadly I can't do anything here : /
So, I think I found out what the problem is.
I played Brutal Legend to a point where it crashed reproducible (3 times). Then I deactivated the KDE power management service (powerdevil) and I could play on without crashing...
It seems, powerdevil switched off my monitor or does other stupid stuff to let Cat 13.6beta crash.
Whom should I report this problem to? AMD? KDE? DoubleFine?
You will have to open bugs on both KDE/Powerdevil and DoubleFine. This has nothing to do with AMD(yet). I think its BL grabbing mouse and keyboard illegally from system the way that it makes KDE think devices are inactive the whole time. If thats confirmed and fixed - there is another bug associated with BL - ability to resume game from sleep, and that might get couped with AMD driver. I mean, game should be able to go into standy and resume from it gracefully.