[alsa-devel] [PATCH 2/5] ALSA: hda/generic - Fix wrong initial power state for fixed pins

[Raymond Yau]

>
> When the widget power-saving is enabled, the first automute hook
> invocation checks through the whole pins and it also tries to
> synchronize the power state.  However, this results in a wrong state
> because it calls unconditionally snd_hda_jack_detect_state().
> This patch adds a check of jack detectability before the actual jack
> detection call.

What happen when the computer has no headphone jack ?

No mic jack and internal mic

Those  thin mini itx motherboard use firmware to disable mixer and remove
all input pins

# Prevent the AA-loopback from being enabled which can pull in white noise
(ACI#380)
[hint]
mixer_nid = 0

Will the driver still power down the audio mixer and audio inputs ?

Seem driver still create capture device when there is no input pins

https://bugs.freedesktop.org/show_bug.cgi?id=54881#c16

https://bugs.freedesktop.org/show_bug.cgi?id=54881#c16