I found this mailing list ‘thread’ an interesting read: [opensuse-factory] M1 problem with backlisting nouveau](http://lists.opensuse.org/opensuse-factory/2011-06/msg00228.html)
In particular from here this option to add at boot time :
rdblacklist=nouveau nouveau.modeset=0
… thats a boot code I never would have guessed for black listing the nouveau driver.