I can confirm this problem in my Jaunty, too. However, it's not always reproducible: sometimes the audio is properly restored after boot, and sometimes is muted. The problem appears in Jaunty; working perfectly in Intrepid.
$ cat /proc/asound/cards
0 [VT82xx ]: HDA-Intel - HDA VIA VT82xx HDA VIA VT82xx at 0xdfdfc000 irq 17
I can confirm this problem in my Jaunty, too. However, it's not always reproducible: sometimes the audio is properly restored after boot, and sometimes is muted. The problem appears in Jaunty; working perfectly in Intrepid.
$ cat /proc/asound/cards
HDA VIA VT82xx at 0xdfdfc000 irq 17
0 [VT82xx ]: HDA-Intel - HDA VIA VT82xx