SOLVED Realtek ALC662 on Linux

I used this how to as well as other posts around the web to solve my ALC662 sound problem in Salix OS. However, this should work for other linux distributions as well as other motherboards that use Realtek ALC662.

I combined information from all of my searches and this is what worked for my Intel d510mo.

1. Make sure front audio is turned on in bios.
2. Then make sure in alsa sound card the default sound card is set to alsa. I use Salix Os so this is found at: Menu > System > Alsa Sound Card. Not sure about other distributions.
3. Reboot.
4. As root find out model of card. It should ouput Realtek ALC662 for the Intel d510mo motherboard:

su
alsaconf
cat /proc/asound/card0/codec* | grep Codec

5. Over at kernel.org it shows that one of the options for ALC662 is 6-channel: 3stack-6ch.
6. According to Intel the d510mo does have 6 channel (with spdif) so let's try 3stack-6ch (3stack-6ch-dig should also work).
7. Now let's setup our option from step 6. First use alsaconf to configure alsa. Then create the file snd_hda_intel in /etc/modprobe.d (or edit the file sound). Then insert the line: options snd-hda-intel model=3stack-6ch. Then write and quit the file:

su
cd /etc/modprobe.d
vi snd_hda_intel
i
options snd-hda-intel model=3stack-6ch 
# hit the escape key first then...
:wq

8. Probe for the new module option now:

modprobe -r snd_hda_intel
modprobe snd_hda_intel

9. Call up alsamixer to change your settings:

alsamixer

10. Change your sound settings. NOTE: surround is now an option and you can also now change channel mode from 2ch to 6ch. Use your arrow keys to navigate to each setting.:
1. change channel mode to 6ch
2. raise volumes as needed
3. mute any inputs not being used
11. Make sure that all of your work to get the correct settings get stored:

alsactl store 0

12. Reboot:

reboot

13. Test your sound.

Post any comments or questions you may have and I'll see what I can do to help out. Let me know if this helps your setup. I hope it does!