945GM<->965GM huge performance differences when running GLX apps in parallel

[Jens Stroebel]

		Hi.

When I start the example-prog teapot on intel 965GM, it runs with 160 
FPS BUT drops to astonishing 5 FPS when a glxgears is started.

On intel 945GM, this is along the lines of 60 PFS <-> 30 FPS (which is 
50%, compared to .. below 5% in the above case).

Can anybody tell me why this is so?

		greets,
		  jens
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