Comment 34 for bug 893210

your 12.04 also ignore js0 and js1

0:72 = 0004
0:74 = 1001
0:76 = 2010
0:78 = 0000
0:7a = 0000
0:7c = 4144
0:7e = 5374

do js0 st and js1 st of register 0x72 reflect the jack state of headphone and line out jack ?