diff -ru alsa-driver-1.0.22.1/alsa-kernel/pci/hda/patch_realtek.c alsa-driver-1.0.22.1-patched/alsa-kernel/pci/hda/patch_realtek.c
--- alsa-driver-1.0.22.1/alsa-kernel/pci/hda/patch_realtek.c	2010-01-20 18:29:00.167994662 +1100
+++ alsa-driver-1.0.22.1-patched/alsa-kernel/pci/hda/patch_realtek.c	2010-01-20 18:22:31.776007590 +1100
@@ -9176,6 +9176,7 @@
 	 */
 	SND_PCI_QUIRK(0x106b, 0x4000, "MacbookPro 5,1", ALC885_MB5),
 	SND_PCI_QUIRK(0x106b, 0x4600, "MacbookPro 5,2", ALC885_MB5),
+	SND_PCI_QUIRK(0x10ec, 0x0885, "MacbookPro 5,2", ALC885_MB5),
 	{} /* terminator */
 };