This seems to work if I tell it that it's a mbp3. Not sure if there are actually any differences.

Signed-off-by: David Woodhouse David.Woodhouse@intel.com

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c index 6602516..e9b2cbd 100644 --- a/sound/pci/hda/patch_realtek.c +++ b/sound/pci/hda/patch_realtek.c @@ -6557,6 +6557,7 @@ static int patch_alc882(struct hda_codec *codec) board_config = ALC885_IMAC24; break; case 0x106b00a1: /* Macbook (might be wrong - PCI SSID?) */ + case 0x106b00a4: /* MacbookPro4,1 */ case 0x106b2c00: /* Macbook Pro rev3 */ case 0x106b3600: /* Macbook 3.1 */ board_config = ALC885_MBP3;