On 2014年09月25日 17:40, 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://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda?id=f1e762ddc8035f803d15f8c524151bf788482ec2
On some hda codecs, the user may select stereo mix as input source
Also if user have a tv card connected to line in , your patch require
user to unplug the cable when he use Bluetooth headset
I don't think so, if the user use the line in device and select the line
in device as the default source, when the Bluetooth connected and set
"only_from_unavailable=yes", the default source will not switch to
Bluetooth, if user want to use Bluebooth as the active input, he needs
to manually select Bluetooth headset from sound-setting, user does not
need to unplug the cable.
If users want to unconditionally switch to bluetooth as before this
module does, he just pass "only_from_unavailable=no" or does not pass
this argument.
>
> Under this situation, if we connect a bluetooth headset, the gnome
> sound-setting will list bluez input/output devices, but they are not
> active devices by default. This looks very weird that sound-setting
> lists only one input device and one output device, but they are not
> active. To change this situation, we add an argument, the policy is
> if a new source/sink is connected and current default source/sink's
> active_port is AVAILABLE_NO, we let the new added one switch to
> default one.
>
What is the default source when user disconnect his Bluetooth headset ?
The pulseaudio will use algorithm to find a highest priority input
source and set it to default source.
My patch just add a option to let pulseaudio to conditionally switch to
sink/source, if users want the unconditionally switch as before, he can
do it by setting the argument to no.
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