My apologies for bringing up an old thread, but I want to give a possible solution for some of the people with this sound error...
I own a Gateway MT6452 which uses the SB450 HDA Audio driver (ATI) which is in many other laptops, so the solution should apply to most of the laptops with an ATI chipset and sigmatel sound...
- First navigate to /etc/modprobe.d/
- Now create a file and call it "sound" (w/o quotes)
- Open the file and insert
Code:
options snd-hda-intel probe_mask=3 position_fix=3
- Then save the file and restart...
Now when you boot up you should no longer receive the ALSA error spamming at you and you will be greeted with the beautiful sound of the BT boot 
It took me a couple hours of googling and thread searching to find this so I figured I'd make it a little bit easier on those still suffering from this problem...
Credits for the solution go to
burghardt.pl/2007/11/debian-gnulinux-on-acer-aspire-5102wlmi/
^^ Sorry couldn't link (<15 posts)