Comment 16 for bug 181121

I can confirm a very similar issue (reported as bug #200804): if using two displays every GL screensaver is _very_ slow and hangs nine out of ten times when I move the mouse/hit a key instead of showing me the password dialog to unlock my screen. It happens only to GL screensavers.
Logging in remotely and killing the screensaver gives my desktop back.

using current 8.04

00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (rev 0c)