В Ubuntu свалился. Так вот, выдержка поста с фороникса:
The Debian change-log simply mentions «New upstream release 8.84.6.» This proprietary AMD driver for Radeon / FirePro graphics cards is compatible with xorg-server 1.10 and also the Linux 2.6.38 kernel as found in Ubuntu 11.04.
Is there any features to be found in this early Catalyst 11.4 driver update? Yes, there is. The libGL and libglx libraries have been renamed to fglrx-libGL and fglrx-libglx. Why? Dynamic switching support. In looking at the package that was provided to Canonical, there is support for switchable graphics! For notebooks with AMD and Intel graphics!
For those with notebooks that have a dedicated AMD GPU and Intel IGP, this can allow you to switch between graphics processors. Though due to current limitations of the X.Org Server, the X Server must be restarted when switching. At that point, the libGL library will also be redirected to the appropriate OpenGL library so that there is correct OpenGL rendering support. This is Linux support for AMD's PowerXpress feature. I'll talk more about this feature finally implemented under Linux shortly.
А нвидиа пока даже простую поддержку Optimus реализовать не может, не говоря уже о переключении.