Comment 5 for bug 850772

Okay, that starts to make sense; I wondered if it might be something like that.

Would you mind booting to a LiveCD and see if the hang reproduces?

What I'm thinking is that it's not unusual for random config files, settings, etc. to accumulate over time. In theory Ubuntu should work fine swapped between hardware, but given that you say you're seeing other bugs too I have to wonder if you've just got some cruft built up. So testing a LiveCD should avoid all of that.

Fwiw, while in theory a Ubuntu installation should transfer fine from computer to computer, with my own hardware I don't trust that and always do fresh reinstalls (after backing up all my personal files).