Hi all,

I have installed Ubuntu 11.04 Natty Narwhal. I'm using the Gnome desktop (Ubuntu Classic) instead of Unity.

My problems is, when I launch certain applications, most of the time LibreOffice ones, Ubuntu desktop freezes.

When this happens the desktop becomes unresponsive to the keyboard. However the mouse pointer can still be moved around. Everything on the screen will freeze including panels and their items.

This happens only when an application launches.

I have already set up a shortcut key combination so that Ctrl + Alt + Backspace will perform a session restart. But when the above mentioned problem occurs, shortcut keys do not work (so I can't just do a session restart). So there's nothing to do other than restarting the laptop by holding the power button down.

My question is, why does this happen? And is their any known fix?

Thanks in advance.