Sound setup

This thing assumes you're running diablo kernel

Run scripts/n8x0-password.pl from n8x0 overlay and add what it says to /etc/portage/mirrors.

$ /usr/local/portage/layman/n8x0/scripts/n8x0-password.pl
Please add this line to /etc/portage/mirrors :
        n8x0    <url_goes_here>

Install sys-apps/n8x0-env with USE='nokia-osso-linux alsa' from n8x0 overlay.

Add required boot services

rc-update add osso-dsp-loader boot
rc-update add alsasound boot

Reboot or start services manually

/etc/init.d/udev restart
/etc/init.d/osso-dsp-loader start
/etc/init.d/alsasound start

Run alsamixer and unmute PCM (and Line for N810)

alsamixer -c 0

Test sound (you should hear 'front center' in female voice)

aplay /usr/share/sounds/alsa/Front_Center.wav