Im using Ubuntu 14.10. I have been using Nvidia propitiatory drivers downloaded from Nvidia. Everything worked fine. In the morning I got an update to the kernel and I applied it. After restarting, lightdm came up as usual. I applied the password and then no Unity. Only the wallpaper.
I reinstalled the nvidia drivers, removed it, installed from the repo (nvidia-current), removed, installed nouveau driver... Reset unity, compiz, set permissions for home, remove Xauthority. Nothing helped! How can I fix my system now? Please help!
Update The guest session works!