Asus n76vz dh71 no 2.1 sound setting on ubuntu 12.04

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http://askubuntu.com – I've just got the asus n76vz dh71 with sonicmaster subwoofer. I got the output on the sonicmaster, but essential its a right channel, not the sub. I was following this No sound from external subwoofer "Sonic Master" on an Asus N76VM and this: https://wiki.archlinux.org/index.php/ASUS_N55SF to try to fix the Intel Audio bug, but after reboot, ubuntu does not see any audio device at all. I must remove the new 2.1 mapping in extra-hdmi.conf in oerder to have it work again The Intel Card here is 00:1b.0 Audio device: Intel Corporation Panther Point High Definition Audio Controller (rev (HowTos)