Installation Pre-installation checklist Drivers installed correctly? See in the SDB under Configuring graphics cards and NVIDIA to set them up. The open source radeon driver should work of the box, especially if you have a Radeon HD5xxx (radeonhd module). However, you might try fglrx if that doesn't work for you: ATI. Test if composite is enabled: running grep Composite /var/log/Xorg.0.log should