does your motherboard have orange and grey jack at rear panel ?
add the following line to /etc/modprobe.d/alsa-base.conf
options snd-hda-intel model=3stack
Node 0x10 [Pin Complex] wcaps 0x400181: Stereo
Pincap 0x00000037: IN OUT Detect Trigger ImpSense
Pin Default 0x01016011: [Jack] Line Out at Ext Rear
Conn = 1/8, Color = Orange
DefAssociation = 0x1, Sequence = 0x1
Pin-ctls: 0x40: OUT
Unsolicited: tag=00, enabled=0
Connection: 1
0x04
Node 0x11 [Pin Complex] wcaps 0x400181: Stereo
Pincap 0x00000037: IN OUT Detect Trigger ImpSense
Pin Default 0x0101201f: [Jack] Line Out at Ext Rear
Conn = 1/8, Color = Grey
DefAssociation = 0x1, Sequence = 0xf
Pin-ctls: 0x40: OUT
Unsolicited: tag=00, enabled=0
Connection: 1
0x03
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https://bugs.launchpad.net/bugs/641485
Title:
No sound in front audio jack, lucid, Intel ICH8
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