Comment 8 for bug 551606

The abovementioned fix has been included upstream in kernel 2.6.32.12. From the changelog:

commit 97d0f3f2a0bd5c346449a61a77dc1d140ca3782f
Author: Daniel T Chen
Date: Tue Mar 30 13:29:28 2010 -0400

    ALSA: hda: Fix 0 dB offset for Lenovo Thinkpad models using AD1981

    commit b8e80cf386419453678b01bef830f53445ebb15d upstream.

    BugLink: https://launchpad.net/bugs/551606

    The OR's hardware distorts at PCM 100% because it does not correspond to
    0 dB. Fix this in patch_ad1981() for all models using the Thinkpad
    quirk.

    Reported-by: Jane Silber
    Signed-off-by: Daniel T Chen
    Signed-off-by: Takashi Iwai
    Signed-off-by: Greg Kroah-Hartman