https://bugs.freedesktop.org/show_bug.cgi?id=65192
--- Comment #5 from Luzipher luziphermcleod@yahoo.ie --- (In reply to comment #4)
Beware that AFAIK the screensaver hacks aren't spawned from the xscreensaver-demo process but from the xscreensaver daemon process. Did you confirm that the latter saw the environment variable?
I'm very sure that the environment variable is seen. Today, I added it to my /etc/environment again, restarted, and confirmed it is there by echo $R600_HYPERZ, which printed 0, as expected. I'm starting X manually (with startx), so I'm quite certain that the xscreensaver daemon process also sees the variable.
All the following tests have been done with R600_HYPERZ=0 in /etc/environment.
As I mentioned in my previous comment, starting antmaze with the command R600_HYPERZ=0 /usr/lib/misc/xscreensaver/antmaze works more often. In fact I couldn't get it to crash in about 25 tries today.
What did crash was again juggler3d on the third try when _closing_ its window. The command used was: R600_HYPERZ=0 /usr/lib/misc/xscreensaver/juggler3d
Also, by using the xscreensaver-demo application (with R600_HYPERZ=0 in /etc/environment) and switching between random screensavers, I could trigger a crash quickly.