Comment 113 for bug 318942

Hit alt+f2 and type:
gksudo chmod +x /etc/rc.local
Hit alt+f2 again and type:
gksudo gedit /etc/rc.local

And add these lines before 'exit 0' to make sure your volume is always the same:

amixer set Speaker unmute
amixer set Speaker 100%
amixer set 'PC Beep' mute
amixer set Master 70%
Save and exit.

source: http://www.codealpha.net/193/jaunty-getting-the-sound-working-on-the-hp-mini-1000-or-1120nr/