Installation

1. Install libdrm with the nouveau support

    echo "*/* video_drivers: nouveau" >> /etc/paludis/options.conf
    cave resolve -x libdrm

2. Install the 2D nouveau driver for xorg

    cave resolve -x xf86-video-nouveau

3. Start xorg with this minimal config

    cat <<EOF >>/etc/X11/xorg.conf
    echo Section "Device"
       Identifier "myvideocard"
       Driver     "nouveau"
    EndSection
    EOF

4. Optional: For 3D, install mesa with support for gallium

    echo "*/* video_drivers: gallium-nouveau" >> /etc/paludis/options.conf
    cave resolve -x mesa

5. Restart X, and check that everything is working

    /etc/init.d/displaymanager restart
    glxinfo | egrep 'OpenGL.*string.*'

   If everything is working correctly, you should see something like:

    OpenGL vendor string: Mesa Project
    OpenGL renderer string: Software Rasterizer
    OpenGL version string: 2.1 Mesa 7.8.1
    OpenGL shading language version string: 1.20

   On working gallium3d, it will look like:

    OpenGL vendor string: nouveau
    OpenGL renderer string: Gallium 0.4 on NV4B
    OpenGL version string: 2.0 Mesa 7.8.1
    OpenGL shading language version string: 1.20