https://bugzilla.kernel.org/show_bug.cgi?id=32162

--- Comment #7 from Chris Rankin rankincj@yahoo.com 2012-09-02 22:07:10 --- Hard to be sure, mainly because Gnome 3 doesn't seem to run my OpenGL screensavers for very long before putting the monitor into DPMS sleep instead.

I did recently (i.e. 3.5.3 kernel) have screensaver trouble with my laptop and its M66GL chip: X had difficulty waking up after entering DPMS sleep, and the kernel crashed with memory errors shortly afterwards anyway. But this could be a separate bug.