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Binary package hint: gnome-screensaver
My screensaver has been crashing intermittently. Sometimes the screen will
flicker (as though changing video modes), then revert to the GDM login screen.
Other times the display will freeze entirely, showing either a frozen image of
the screensaver or a black screen with some white and blue patterns for the top
inch or so (If it does it again I'll take a picture and post it). Once, I
experienced a situation similar to bug #78449. I have timed the interval
between locking and crash and it seems random. I think I have narrowed this
down to the screensavers that use OpenGL - the "really slick" (rss-glx) family
exhibits it most but I have also observed this in others such as hufo's tunnel.
This appears to only happen when Compiz/Desktop Effects are running, but it is
hard to say as it does not occur consistently - I will try leaving the
screensaver running all night without desktop effects and report on the
results. In all the latter two cases I am unable to switch to a virtual
terminal to restart gdm, and am forced to do a hard reset (holding down the
power button)
This is happening on a Dell Vostro 1500 with Intel GMA 3100 (965 chipset - I
know its blacklisted for video problems but openGL rendering should be separate
from xv playback), although I have also experienced a similar situation on an
intel 810 chipset.
In the comments about bug #78449, I noticed a suggestion to manually set the
amount of shared video ram in xorg.conf - is this a possible solution and if so
what would be the recommended amount?
** Affects: rss-glx (Ubuntu)
Importance: Medium
Status: Incomplete
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: Incomplete
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[i915] OpenGL Screensavers Crash
https://bugs.edge.launchpad.net/bugs/144663
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