Hi,
Please refer to the [0003641] on bugtracking system. The user found that "model=targa-2ch-dig" works and provided the ID.
diff -Nur a/alsa-driver-hg20071211/alsa-kernel/pci/hda/patch_realtek.c b/alsa-driver-hg20071211/alsa-kernel/pci/hda/patch_realtek.c --- a/alsa-driver-hg20071211/alsa-kernel/pci/hda/patch_realtek.c 2007-12-04 09:00:07.000000000 +0800 +++ b/alsa-driver-hg20071211/alsa-kernel/pci/hda/patch_realtek.c 2007-12-11 15:30:20.000000000 +0800 @@ -7173,6 +7173,7 @@ SND_PCI_QUIRK(0x1462, 0x7327, "MSI", ALC883_6ST_DIG), SND_PCI_QUIRK(0x1462, 0x0349, "MSI", ALC883_TARGA_2ch_DIG), SND_PCI_QUIRK(0x1462, 0x0579, "MSI", ALC883_TARGA_2ch_DIG), + SND_PCI_QUIRK(0x1462, 0x040d, "MSI", ALC883_TARGA_2ch_DIG), SND_PCI_QUIRK(0x1462, 0x3729, "MSI S420", ALC883_TARGA_DIG), SND_PCI_QUIRK(0x1462, 0x3ef9, "MSI", ALC883_TARGA_DIG), SND_PCI_QUIRK(0x1462, 0x3b7f, "MSI", ALC883_TARGA_2ch_DIG),