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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Mistreats headphone port with dysfunctional ALSA Master volume on ICH7"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=42353#c31">Comment # 31</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Mistreats headphone port with dysfunctional ALSA Master volume on ICH7"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=42353">bug 42353</a>
              from <span class="vcard"><a class="email" href="mailto:superquad.vortex2@gmail.com" title="Raymond <superquad.vortex2@gmail.com>"> <span class="fn">Raymond</span></a>
</span></b>
        <pre>only those in whitelist call snd_ac97_update_bits(ac97, AC97_AD_JACK_SPDIF,
1<<11, 1<<11);


<a href="https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/tree/sound/pci/ac97/ac97_patch.c">https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/tree/sound/pci/ac97/ac97_patch.c</a>

static unsigned int ad1981_jacks_whitelist[] = {
    0x0e11005a, /* HP nc4000/4010 */
    0x103c0890, /* HP nc6000 */
    0x103c0938, /* HP nc4220 */
    0x103c099c, /* HP nx6110 */
    0x103c0944, /* HP nc6220 */
    0x103c0934, /* HP nc8220 */
    0x103c006d, /* HP nx9105 */
    0x103c300d, /* HP Compaq dc5100 SFF(PT003AW) */
    0x17340088, /* FSC Scenic-W */
    0 /* end */
};

static void check_ad1981_hp_jack_sense(struct snd_ac97 *ac97)
{
    if (check_list(ac97, ad1981_jacks_whitelist))
        /* enable headphone jack sense */
        snd_ac97_update_bits(ac97, AC97_AD_JACK_SPDIF, 1<<11, 1<<11);
}</pre>
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