System freeze after login
I'm on Linux Deepin (Ubuntu 12.04 with Gnome Shell). This happens often at random that after login, the desktop appears, I can move the mouse but I can't click on anything. The desktop is frozen. I have to then switch to a tty and reboot, after which everything is normal. This happened today also, and I had to reboot. After reboot I copied over the system logs and am uploading it if anyone can please help me identify what the problem is. Note: This happens on stock ubuntu 12.04 kernel and also on the 3.4 kernel. Please help!