Hello all, The following patch adds full support for Asus Laptops N55SF/N75SF (Possibly more models) with external subwoofer. It adds a new model (asus-nx5) and proper PCIID detection. Example asoundrc for upmixing and dmix is attached as well. (Thanks to K900 from AgiliaLinux dev. conference for it as well as testing on N55SF) Currently everything is supported except Subwoofer pin autosensing. It is somehow implemented in windows drivers, but I couldn't get it neither via codec's gpio or regular 0x16 unsol event. In 2ch mode the subwoofer is off, so should save a little bit of battery. I couldn't test automic feature and spdif, because I don't have the hardware around. Since alc662_quirks.c looks a little bit overbloated, I moved my quirks to a separate file. If that's not OK, I'll resubmit the patch. (This is my first patch to alsa-devel, so I might be missing something)

Regards, Andrew