Possible Duplicate:

Unity doesn't load, no Launcher, no Dash appears

I just upgraded from ubuntu 11.10 to 12.04. When I log in into Unity 3D and Gnome 3 I only get a wallpaper for few seconds and then the screen goes blank with mouse pointer showing. I can easily log in to Unity 2D and Gnome Classic (no effects).

I have Nvidia GeForce 7025 / nForce 630a/integrated/SSE2/3DNOW! Graphic card. I checked my card compatibility using /usr/lib/nux/unity_support_test -p and came out with following result:

jeevan@jeevan-System-Product-Name:~$ /usr/lib/nux/unity_support_test -p 

OpenGL vendor string:   NVIDIA Corporation

OpenGL renderer string: GeForce 7025 / nForce 630a/integrated/SSE2/3DNOW!

OpenGL version string:  2.1.2 NVIDIA 295.40



Not software rendered:    yes

Not blacklisted:          yes

GLX fbconfig:             yes

GLX texture from pixmap:  yes

GL npot or rect textures: yes

GL vertex program:        yes

GL fragment program:      yes

GL vertex buffer object:  yes

GL framebuffer object:    yes

GL version is 1.4+:       yes



Unity 3D supported:       yes

After lot of reading and going through several post and also trying different solutions to it I am still not able to get Unity 3D working. I think the problem is with the Nvidia Graphic Driver 295.40 which is crashing Compiz. I tried to roll back to Nvidia 295.33 but it doesn't allow me to do so as it keeps asking to install from root. I cannot find anyway to login as root. I badly need help. I somehow want to get UNITY 3D running.

Any advice would be appreciated.