Comment 48 for bug 1451170

/sys/class/sound/hwC1D0/init_pin_configs:
0x12 0x90a60140
0x14 0x90170110
0x15 0x04211020
0x16 0x40000000
0x18 0x04a11050
0x19 0x411111f0
0x1a 0x411111f0
0x1b 0x411111f0
0x1d 0x40c6852d
0x1e 0x04451130
0x1f 0x411111f0

seem n750jk also have detectable mic jack by bios setup

do n750jk user manual or specification mention the combo jack support which kind of headset (cita/ omtp)?

May be just those CITA headset need those specific coef and omtp headset work by default

the proc coefs of n550lf seem different from those used in dell-headset-multi