I am suffering from the bug which crashes Ubuntu when I click Alt+Tab: https://bugs.launchpad.net/unity/+bug/975168 .
While I was doing a
do-release-upgrade -d just now to install 12.04, I accidentally clicked Alt+Tab. Now Unity crashed, Alt+Ctrl+F2 doesn't work. All I have is a blank screen. Usually Unity used to restart by itself but it didn't this time.
So my question is, since the upgrade has already finished downloading the packages and was installing them during the crash, should I leave the PC alone as it maybe still installing in the background? Or should I restart it (by holding the power button or Ctrl+Alt+Delete)?