[LAU] Jack & pulse...knickers in a twist.

[Mac]

Update to the last post...if I plug in the headphones before I run the
script, the headphones. but if I unplug them the speakers don't come on.

On Wed, Jun 6, 2018 at 1:31 PM, Mac <macdroid53 at gmail.com> wrote:

> Just caught an interesting thing.
>
> With the script as shown below, I get solid, reproducible setup every time:
>
> #!/bin/bash
> killall -9 jackd jackdbus
> jack_control ds alsa dps capture none dps playback none
> jack_control dps device hw:PCH
> jack_control dps rate 48000
> jack_control dps nperiods 2
> jack_control dps period 256
> jack_control start
> pactl unload-module module-udev-detect
> pactl unload-module module-alsa-card
> pactl unload-module module-jackdbus-detect
> pactl load-module module-jack-sink client_name=PulseOut channels=2
> connect=no
> pactl load-module module-jack-source client_name=PulseIn channels=2
> connect=no
>
> jack_connect system:capture_1 PulseIn:front-left
> jack_connect system:capture_2 PulseIn:front-right
> jack_connect PulseOut:front-left system:playback_1
> jack_connect PulseOut:front-right system:playback_2
>
> But, the sound is specifically connected to the onboard speakers of the
> laptop. If I plug headphones in, the speakers stop and nothing from the
> headphones.
>
> I suppose this is expected, since pavucontrol shows only the Jack sink
> (PulseOut).
>
> On Wed, Jun 6, 2018 at 12:38 PM, Mac <macdroid53 at gmail.com> wrote:
>
>>
>>
>> On Wed, Jun 6, 2018 at 10:22 AM, Bill Purvis <bill at billp.org> wrote:
>>
>>> On 06/06/18 14:12, Mac wrote:
>>>
>>>
>>>
>>> ....
>>>
>>> Apparently not. I tried "jack_control dps device surround71:PCH,0" and
>>> still got playback_1,_2. (There are also surround21, 41, etc. none of those
>>> changed anything either.)
>>> As for hdajackretask, when I tried to "Apply now" I got a device busy
>>> message. I didn't try "Install boot override".
>>>
>>>
>>>> In my case the real answer is I don't know. I tend to disable any
>>>> internal audio device to clear up one more thing that may interfere with
>>>> "real audio".
>>>>
>>>>
>>> I use qjackctl, so I'm not that familiar with the command line interface.
>>> In the Qjackctl settings panel, under advanced, it shows the 'system'
>>> output device,
>>> and also a field for number of channels. I had an 8-channel DAC
>>> connected a while back
>>> and setting channels=8 and restarting produced 8 system outputs. So it
>>> is possible.
>>>
>>> Looking at web pages for jack_control, I'd suggest trying:
>>>
>>>     jack_control dps device surround71LPCH,0
>>>     jack_control dps channels 7
>>>
>>> might be the answer?
>>>
>>
>> Assuming the 'L" was a typo i changed the lines in the script to:
>>
>> jack_control dps device surround71:PCH,0
>> jack_control dps channels 7
>>
>> That produced the following error after attempting execute the second
>> line:
>>
>> DBus exception: org.jackaudio.Error.InvalidArgs: Invalid container
>> address 'driver':'channels':'(null)' supplied to method 'GetParameterInfo'.
>>
>> A look at the jack_control help showed the parameter was "outchannels:
>> Number of playback channels (defaults to hardware max) (uint:notset:0:0)"
>>
>> I assume this means the surround71 knows only 2 channels, but I changed
>> the script:
>>
>> jack_control dps device surround71:PCH,0
>> jack_control dps outchannels 7
>>
>> This does not throw an error, but still only results in 2 system outputs.
>>
>>
>>
>
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