Comment 34 for bug 1211920

So the 5460 (PCI SSID 1028:05da) and the 5470 is actually slightly different. Both 5460 and 5470 suffer from the mono DAC node at 0x03 problem. The difference is that the 5470 needs the headset mode patch set as well, whereas 5460 has independent detection for headphone and mic (i e, can distinguish a headset from a headphone).

For the surround 2.1 mode to show up in PulseAudio you also need to add this section to the relevant file:

[Mapping analog-surround-21]
device-strings = surround21:%f surround40:%f
channel-map = front-left,front-right,lfe,lfe
paths-output = analog-output analog-output-lineout analog-output-speaker analog-output-desktop-speaker
priority = 8
direction = output