I installed elementary Freya yesterday and I encountered a weird bug after rebooting. I'll try to explain it as best as I can.
When I log into my session, the windows do not behave properly :
- I can't click on any of the buttons, in all windows
- I can't get focus on another window by clicking on it
- I can't access the top bar (with the clock and the notification widgets) or launch an app from the dock if another window is open
- Keyboard shortcuts seem to work (Alt-Tab, Tab to navigate in a window...)
- After I log out (with Ctrl+Alt+Del) and log in again, everything works perfectly.
It seems to be a graphical issue, which is why I tried installing the NVidia proprietary drivers, but the problem persisted.