diff -r bf193701a812 pci/hda/patch_analog.c
--- a/pci/hda/patch_analog.c	Mon Feb 26 16:07:42 2007 +0100
+++ b/pci/hda/patch_analog.c	Thu Mar 01 07:08:39 2007 -0800
@@ -839,6 +839,7 @@ static struct snd_pci_quirk ad1986a_cfg_
 	SND_PCI_QUIRK(0x144d, 0xc026, "Samsung X11", AD1986A_LAPTOP_EAPD),
 	SND_PCI_QUIRK(0x144d, 0xc504, "Samsung Q35", AD1986A_3STACK),
 	SND_PCI_QUIRK(0x144d, 0xc027, "Samsung Q1", AD1986A_ULTRA),
+	SND_PCI_QUIRK(0x17aa, 0x1011, "Lenovo M55", AD1986A_LAPTOP),
 	SND_PCI_QUIRK(0x17aa, 0x1017, "Lenovo A60", AD1986A_3STACK),
 	SND_PCI_QUIRK(0x17aa, 0x2066, "Lenovo N100", AD1986A_LAPTOP_EAPD),
 	SND_PCI_QUIRK(0x17c0, 0x2017, "Samsung M50", AD1986A_LAPTOP),