Running AC on Xubuntu?

[KA:Konstalainen]

Any help? AC installed, required packages (should be) installed...

Running ./assaultcube.sh gives:

Your platform does not have a pre-compiled Cube client.
Please follow the following steps to build a native client:
1) Ensure you have the SDL, SDL-image, OpenAL, and OpenGL libraries installed.
2) Change directory to source/src/ and type "make install".
3) If the build succeeds, return to this directory and run this script again.

And running ./bin_unix/linux_client says:

current locale: fi_FI.UTF-8
init: sdl
init: net
init: world
init: video: sdl
init: video: mode
Unable to create OpenGL screen (Couldn't find matching GLX visual)

Thanks already in advance!