> Yes DRC that makes sense. In hindsight my setup may have always had the 
> software mesa driver and therefore always ignored that env variable. Maybe 
> thats the diff between the 2 env variables. How did you guys go with 
> LIBGL_ALWAYS_SOFTWARE ?
> 
> A little digging for Red Hat revealed the driver package might be called 
> 'swrast' or 'mesa-dri-swrast-driver' which has swrast_dri.so. Centos might be 
> 'dri-swrast'.

swrast is definitely installed, and I tried all combinations of the two 
environment variables. You're sure that you're using TurboVNC? What I'm saying 
is that I don't understand the mechanism behind how you could use Mesa libGL to 
do the rendering unless Mesa is either (a) integrated into the X server's DRI 
interface or (b) sending the OpenGL commands indirectly through GLX. In either 
case, it requires a capability that the TurboVNC X server doesn't have.
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