Originally Posted by nehapawar
yes i tried rebooting a couple of times.. i'm using gnome.. with metacity...
Ok...do you have another user ID on that box you can try? If not, create one, and try to log in with it, and see if it comes up. If it does, and everything works, you can try to remove (or rename), the .gnome2 directory in your home directory, and log back in.
The downside is, you'll lose your configuration settings, but can easily set them back up. This page https://bugs.launchpad.net/ubuntu/+s...ty/+bug/231034
has some references to problems like yours, and maybe some of the suggestions there can help.