Re: ubuntu sound
have you checked the audio settings in the programs that you use, that they are set to 'alsa'?
jackd is a audio routing program which quite a few sound production programs use (are depending on). get and install 'qjackclt', if you havent already. It is a graphical front end to jackd. LMMS needs jackd to be running before it starts.
what is actualy the deamon jackd and what it makes
Amarok should work without jackd.
tell us how it goes!
ThinkPad T61 / Ubuntu 10.04