Yesterday I updated to Gnome 3. Failsafe mode works just fine but in case of Gnome shell it behaves strange. It doesn't show the changes of picture without forcing to do so. For example if I type something in gnome-terminal I don't see what I type, but I can see it after changing window with Alt+tab.
I suspect I didn't installed all necessary packages or it is something related to mutter. In addition activity menu works very very slow.
How I can try to understand what happens? Or any other clues?