On 19/01/2010 10:51 AM, antonio montagnani wrote:
I upgraded a f12 to rawhide, but when I rebooted my system freezes 
before having the login screen with an arrow that I can move, but that's 
all.

I started also in text mode but when I issue startx, system freezes again.
The same with nomodeset in boot option.

How do I recover???

  
have you tried blacklisting the Opensource nvidia driver an then removing it an then rebooting? does that help,  see this thread.  http://forums.fedoraforum.org/showthread.php?t=235793 , im assuming you have a nvidia chipset?

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Regards Greg