Comment 36 for bug 657976

For those of you using CLUTTER_VBLANK=none - you shouldn't be too
afraid of all the spooky error messages in the terminal. The worst
thing it should give you would be some rendering glitches - which is
nothing compared to the pain you have now anyway I guess ;-)

My initial command to make the CLUTTER_VBLANK permanent didn't work,
sorry about that. In stead you can create the required file by hand by
executing 'sudo nano -w /etc/X11/Xsession.d/10unity-quirks' and then
adding one line to that file 'CLUTTER_VBLANK=none' and save it
(Control-X). Then restart your computer.

I think there are two different issues at play here. The one discussed
for this bug is the CLUTTER_VBLANK issue (which seems to happen on a
range of different hardware), the other is probably related to a most
elusive (but very big) memory leak we seem to be triggering on some
very specific variations of i945 cards - this is bug #652864.

While I continue to chase this, I can assure everyone that we are
taking very serious measures to assure that something similar doesn't
happen for Natty.