Aren Ubuntu/Debian already free?
Neither Debian nor Ubuntu are fully free. Ubuntu installs non-free software by default. Debian provides non-free software through its repositories and includes non-free kernel drivers. We’re also the first distribution to remove GLX^, which Debian has ignored for years. See 1 2 ^GLX is needed for hardware-accelerated 3d graphics in X. Recompiling X, and removing OpenGL, are required due to the non-free SGI Free B license.