Re: [clutter] Clutter first impressions

On Tue, 2007-06-12 at 08:34 +0300, Tommi Höynälänmaa wrote:
> Josh Stewart wrote:
> > 1) Should Clutter work with an Intel graphics adaptor? I first tried
> > this on
> > my laptop and although its a good machine (Core Duo etc) its only got an
> > Intel card. All the demo's ran extremely poorly (ie < 1 FPS) and i
> > thought
> > that there was actually a problem with how I'd compiled everything. This
> > same machine is able to run things such as Beryl without a problem so
> > I'd be
> > very surprised if it doesn't have the hardware grunt for simple demos.
>
>
> I have similar problems (very poor performance) with Clutter using GLX
> backend on my laptop. OpenGL hardware acceleration should be enabled in
> my system as glxinfo says "direct rendering: yes".

There is a known bug in the Intel GL drivers that means waiting for
vblanks (required to stop tearing when updating the screen) seems to
wait for several seconds instead of microseconds.

This fix this, export CLUTTER_VBLANK=0.

Ross

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