I am using 12.04 32-bit, upgraded from 11.10.

Within the last week and a half Unity has hung on me with no option but a hard reboot, which I hate. It usually happens when I am using multiple desktops and applications and switching desktops. The screen just hangs, sometimes broken between desktops and applications, I can move my mouse but cannot click on anything.

alt+f2 , HUD , super+w/s/d and alt+tab/~ does nothing, they do not activate.

I let it rest for 15-20 minutes in hopes it will sort itself out but nothing. I'd hate to move to Unity 2D, but I can't risk having to do hard reboots/shutdowns, or moving to a different DE.

Other information: the only PPA's I have added recently would be the word lens.

2.8GB RAM

processor : 0

vendor_id : AuthenticAMD

cpu family : 15

model : 127

model name : AMD Sempron(tm) Processor LE-1250

stepping : 2

microcode : 0x83

cpu MHz : 1000.000