why is Flight Gear so slow?

[Danilo Piazzalunga]

Douglas Alves wrote:
> 1) On starting glxgears it spat this error first:
>    Xlib:  extension "XFree86-DRI" missing on display ":0.0".
> 
>    Am I missing an upgrade or what?

Maybe your X server is missing some modules. You should reconfigure it to
enable the GLcore, glx and dri modules.

Just run "sudo dpkg-reconfigure xserver-xfree86" and be sure that the above
modules are selected (there is a question about module selection).

By the way, what is your video card? Which video driver for X are you using
(should be the first question you see during reconfiguration).

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