i installed ubuntu 13.10 on my laptop ASUS R552JV - CN195H alongside windows 8.
on windows external subwoofer to this laptop is working but ubuntu doesnt recognize it (there is no sound from subwoofer). i searched for solution and i found some (No sound from external subwoofer "Sonic Master" on an Asus N76VM, https://wiki.archlinux.org/index.php/ASUS_N55SF, N56VZ: Subwoofer not working anymore), but it was for other asus laptop series. i tried them, but it didnt work for me. in sound preferences, there is no option for 2.1 sound.
if someone could help me, i would be thankfull :)