Comment 4 for bug 568600

The abovementioned fix has been included upstream in kernel 2.6.34-rc6. From the changelog:

commit 5c1bccf645d4ab65e4c7502acb42e8b9afdb5bdc
Author: Daniel T Chen
Date: Thu Apr 22 17:54:45 2010 -0400

    ALSA: hda: Use STAC_DELL_M6_BOTH quirk for Dell Studio 1558

    BugLink: https://launchpad.net/bugs/568600

    The OR has verified that the dell-m6 model quirk is necessary for audio
    to be audible by default on the Dell Studio XPS 1645.

    This change is necessary for 2.6.32.11 and 2.6.33.2 alike.

    Reported-by: Andy Ross Tested-by: Andy Ross
    Cc: <email address hidden>
    Signed-off-by: Daniel T Chen
    Signed-off-by: Takashi Iwai