Does metacity compositor use acceleration?

Christopher James Halse Rogers chalserogers at
Sat Mar 29 22:43:19 UTC 2008

On Sat, 2008-03-29 at 14:18 +1100, James "Doc" Livingston wrote:
> On Sat, 2008-03-29 at 03:31 +0100, thibaut bethune wrote:
> > "No, you don't need 3D acceleration for this compositor, so cards with
> > sucky GL will be able to use it. You will however need a good and fast
> > XRender implementation. I'm using the both the binary NVidia driver
> > and the opensource Intel driver. The NVidia driver works well, the
> > Intel one (as shipped by Gutsy) works ok, but CPU usage can get high.
> > I've been told the Fiesty Intel driver is quite slow"
> For those people with a NVidia card who either can't or don't want to
> use the proprietary driver, the Nouveau driver works really well with
> Metacity's compositing in my experience.
In my experience, with the right card (nv4x based - geforce 6 or 7),
nouveau is substantially faster than the proprietary driver at 2D.   On
the other hand, it's still under heavy development, regressions
sometimes creep in, and you'll need a git snapshot of libdrm to drive

If you don't mind the (very) occasional terminal excursion to rescue X,
I regularly build nouveau snapshots in my PPA: (see also  If you do decide to try these drivers,
please test the RandR12 codepath
( - this should soon
be make default.  (And then pushed into the kernel module, if I
understand #nouveau correctly).
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