Comment # 11
on bug 73781
from Marek Olšák
I disabled async DMA for R700 due to stability issues and hangs. The core problem hasn't been fixed and will show up once we enable async DMA again. To answer your questions: 1) --enable-debug has a significant performance impact, because it disables compiler optimizations (forces -O0). 2) Yes, restarting the X server is required. The environment variables only affect the terminal where they are set, so they can be useful if you just want to test one app without affecting your system and other apps.
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