(In reply to comment #26)
> Now that I'm back I have a question: is there any simple way to single-step
> through all tests in the r600.tests, or do I have to do it manually ?

When I want to identify which test is causing a GPU hang, I pass the -c 0
option to piglit-run.py to disable concurrent tests and then run piglit over
ssh.  This way you can still see the terminal output after the GPU hangs.

For example:

ssh tstellar@cayman-box
cd piglit
DISPLAY=:0 ./piglit-run.py -c 0 tests/quick-driver-tests