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I've just got the Asus N76VZ DH71 with a Sonicmaster subwoofer. I got the output on the sonicmaster, but essential its a right channel, not the sub.

I was following:

to try to fix the Intel Audio bug, but after reboot, Ubuntu does not see any audio device at all.

I had to remove the new 2.1 mapping in extra-hdmi.conf in order to have it work again. The Intel Card here is

00:1b.0 Audio device: Intel Corporation Panther Point High Definition Audio Controller (rev 04)
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