When playing Verdun (http://store.steampowered.com/app/242860/), every time I go to the settings I get a GPU lockup. Without R600_DEBUG=hyperz everything is fine.
I'm using mesa 4ca203f, llvm 216658, xorg-server 1.16, xf86-video-ati 7.4.0 on Arch Linux. I tried on Linux 3.14, 3.16 and 3.17rc2 with the same results. My graphics card is a HD 7950.
Here's my journalctl log: http://pastebin.com/s80VLPtr
Marek recently posted patches  which are supposed to fix a hang with hyperz. Could you test them? Also there are some other patches which fix rendering with hyperz enabled . As far as I understand these two series were reviewed by not yet mainlined.
Please apply both patches mentioned above and test again. If it still hangs, please record a trace file with apitrace (the recording can be done with hyperz disabled, but please make it as small as possible).
It is obvious but just as reminder, second patch Hohahiu linked is for evergreen you need this one for radeonsi instead:
Thanks for the pointers. I will try as soon as I can.
Alright, so I compiled lib32-mesa-git from here http://pkgbuild.com/~lcarlier/mesa-git/ with the two patches for radeonsi. It doesn't crash anymore with HyperZ enabled.
I can't be 100% sure though, because Steam managed to update the game just before I launched it. A very minor upgrade, so I assume the issue is fixed.
I guess it's time to reenable HyperZ by default, because it's the only issue I ever had with all the games I tried so far. I will try Brütal Legend now.
I reverted to lib32-mesa-git 4ca203f and the issue reappeared. So the fix is definitely working! Great job guys. :)
Marking as RESOLVED FIXED since the fix has just been merged. Keep up the good work!