Won't boot to Unity

[cazador31]

I can boot Natty in classic mode only. When I try to boot to the Unity desktop all I get is a screen with nothing on it. When I installed it was booting to Unity fine. When I booted to classic mode then back to Unity I get the problem

[sikander3786]

Screen with nothing means a blank screen or on with the wallpaper only without any panels etc?

Which graphics card is there and did you install any drivers?

Also see here if it helps.

http://ubuntu4beginners.blogspot.com/2011/04/missing-top-and-side-panels-in-unity.html