Comment # 10 on bug 1046962 from Max Staudt

(In reply to Mircea Kitsune from comment #8)
> Could be we talking a VRAM memory leak?

Hmm, interesting. I don't have a radeon system at hand, but you can typically
monitor memory usage through debugfs. Get a root shell and have a peek through
the files in /sys/kernel/debug/dri/0/ - they're named differently for each
driver, but radeon definitely has at least one that displays the amount of
memory allocated to BOs.

Thus, you can SSH in, or run this on a second screen (as root!):

watch -n 1 cat /sys/kernel/debug/dri/0/THE_FILE_NAME