I have this bug too. If it helps I have test a clean Beta 2 install twice and it doesnt hang on shutdown until the nvidia driver is installed then the bug occurs on every instance of a shutdown. It occurs on ubuntu desktop and kubuntu and in both instances only on nvidia install. Interestingly it did not happen at all on earlier beta/alpha releases.
I have this bug too. If it helps I have test a clean Beta 2 install twice and it doesnt hang on shutdown until the nvidia driver is installed then the bug occurs on every instance of a shutdown. It occurs on ubuntu desktop and kubuntu and in both instances only on nvidia install. Interestingly it did not happen at all on earlier beta/alpha releases.