N56VZ: Subwoofer not working anymore

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http://askubuntu.com – I use Ubuntu 12.04 on Asus N56VZ, the subwoofer used to work doing the following trick advised by Sami: a. Add to rc.local echo 0x1e 0x99130112 > /sys/class/sound/hwC0D0/user_pin_configs echo 1 > /sys/class/sound/hwC0D0/reconfig b. Add options snd-hda-intel model=asus-mode4 in /etc/modprobe.d/alsa-base.conf c. Reboot d. Set the mode to "Analog Surround 5.1 output" in the sound settings panel But a few weeks ago, the "Analog Surround 5.1 output" box does not appear anymore on the sound setting panel I tride to install this driver: https://wiki.ubuntu.com/Audio/Up (HowTos)