gnome 3 doesn't start any more

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On 06/24/2011 01:19 PM, antonio montagnani wrote:

> 
> KDE works fine, my system is not new, old Core 2 system.
> 
> So, what shall I dig in??
> 
> Any update to be removed??
> 

 Ug sorry - at least you have a fallback mode (KDE) - gnome puts a
higher burdon on the graphics driver which is most likely whats causing
the issue

 I don't see any interesting nouveau patches in the upcoming F15 kernel
so - also I am assuming you are not in 'fallback' mode with gnome 3
which turns off the 3D graphics requirements - so now I wonder if you or
a gnomexpert knows how to switch gnome to fallback mode - which has a
chance of working ?

 If you look in /var/log/Xorg* is there anything interesting in there ?

 I have deleted your orig post - with a view to graphics issues you
could see if your list of recent installs offer any hints what may have
changed.