There are these packages in unstable which you probably want to install:
- xserver-xorg-video-nouveau The 2D DDX
http://packages.debian.org/unstable/libgl1-mesa-dri The 3D drivers, see MesaDrivers for their support status. Other packages will automatically be installed as dependencies, such as
- libdrm-nouveau1a Newer versions of these packages are occasionally available in Debian's experimental repository.
If you run into problems, you may want to install various -dbg packages to debug them: