I went to play a youtube video this evening and noticed the sound was only
coming from the left speaker, when I went to see sound preferences by clicking
on the speaker icon in system tray and wen to the hardware tab, the listing for
my sound device disapeared right before my eyes!!! It was there but it
disapeared! And not I cannot get any sound... Whats going on? Under the output
tab it says dumy output, under input it says nothing, under hardware it says
nothing, under sound effects it says it has selected "from theme"

Great thanks in advance if you can help me on this, it worked perfectly fine
days ago, I guess after some upgrade it stopped?