Mein deutsch ist nicht so gut sorry

I'm trying to run VMWare in background on vncserver / xvfb but it continuously brings up a popup saying that the DGA extension cannot be found.
I'm not using any SVGA display so I don't need DGA either to render the window but I DO need to get rid of the annoying popup which prevents my machine from starting up automatically without user invervention.
Can anyone tell me how to do this?
Thanks
Bstraete