I had the exactly same bug and today I saw that I have some fglrx packages with dpkg -l *fglrx*
So I purged all of them with aptitude purge ... and after reboot it works
again with aceleration.
Hope it helps you.
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Agur: Javier Ortega Conde (Malkavian)
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MetaUniversidad: servicios de educación online http://metauniversidad.com
