On 09/26/2014 12:13 AM, Raymond Yau wrote:
>>
>> >
>> > On a machine without fixed connecting audio devices like internal
>> > microphone or internal speaker, and when there is no external audio
>> > devices plugging in, the default source/sink is
alsa_input/alsa_output
>> > and there is no input devices/output devices listed in the gnome
>> > sound-setting.
https://launchpadlibrarian.net/184055917/PulseList.txt
Seem line in is active port when all ports are not available
Pulseaudio won't switch away from line in but gnome won't show line in
since it is not plugged
ports:
analog-input-microphone-front: Front Microphone (priority 8500,
latency offset 0 usec, available: no)
properties:
device.icon_name = "audio-input-microphone"
analog-input-microphone-rear: Rear Microphone (priority 8200, latency
offset 0 usec, available: no)
properties:
device.icon_name = "audio-input-microphone"
analog-input-linein: Line In (priority 8100, latency offset 0 usec,
available: no)
properties:
active port: <analog-input-linein>
Yes, in this situation, the default-source->active_port->available=no,
if you use this module and pass "only_from_unavailable=yes", when
connect bluetooth headset, the default source will automatically switch
to bluez-source.
In this situation, if you plug something in the line-in jack, the
default-source->active_port-available=yes, and if you pass
"only_from_unavailable=yes", the default source will not switch.
https://launchpadlibrarian.net/184417469/alsa2.txt
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