I suspect that this has nothing to do with Mesa and is probably due to 
your compression settings.  If you are on a slow network, try using the 
"Tight + Medium Quality JPEG" preset in TurboVNC.  TigerVNC uses lower 
quality JPEG by default, whereas TurboVNC uses high-quality JPEG by 
default, so you have to dial down the quality in TurboVNC to achieve the 
same results as TigerVNC's default settings.

On 3/7/13 7:21 AM, jupiter wrote:
> Hi,
>
> Follow up recent discussions as well as DRC's recommendation and
> document in http://www.virtualgl.org/Documentation/Mesa, I built mesa
> 9.1 with configuration of "--enable-xlib-glx --disable-dri
> --with-gallium-drivers=swrast" on RHEL 6.2, to replace the TigerVNC by
> TurboVNC and the custom build of mesa 9.1.
>
> The glxgears is running much faster than using TigerVNC. But, there is
> a problem to run 3D rendering, it is too slow to rotate a 3D picture
> in an application such as Chimera which could run smoother on TigerVNC
> than the custom build of mesa and TurboVNC. It seems using xlib-glx
> caused the 3D floating slow down. Any workaround to rectify this
> problem, or we have to use TigerVNC for 3D applications?

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