Re: [LAU] Jack...

From: Markus Seeber <markus.seeber@email-addr-hidden>
Date: Thu Dec 22 2016 - 11:00:58 EET

On 12/19/2016 07:29 PM, Mac wrote:
> I have 3 different PC's (one desktop, two laptops) running Ubuntustudio
> 16.04.
>
> On the desktop I rarely do any capture. It uses jack/ffado/zita-lrx to
> output to a AF12 as a tri-amped playback system. No issues, just works.
>
> On the older laptop (Dell XPS1530) I routinely switch between the on-board
> sound and up to 32in/8out from/to an X32 via USB. Sometimes setup to input
> from the X32 and output to onboard sound. All configs with jack, again, no
> issues, just works.
>
> On my newer laptop (System76 coreI7) I can use the onboard sound with, for
> example, Clementine set to output to alsa or pulse and it works fine. If I
> attempt to use Ardour at the same time with it's own alsa the combined
> output (if Ardour and Clem are playing) audio is distorted. Separately fine.
> If I attempt to use jack, for example use qjackctl to start jack. Qjack
> just hangs. To stop it I jhave to use kill -9. If I then start qjack, it
> shows the I/O connections (pulse source/sink and capture/send). But if I
> send audio to it from Ardour (to jack) or Clementine (jack or pulse) the
> audio sounds like it's in slow motion. If I plug in the usb from the X32,
> start qjackctl, set the I/O device to the X32 usb, viola, works just fine
> for only the I/O ports exposed by the X32 USB. Any attempt to use mixed I/O
> (as described for the Dell above) results in qjack and jackdbus hung and
> only kill -9 will stop them.
>
> I don't HAVE to have this work, but it is nice to be able to plug
> headphones into the PC to monitor whats coming into Ardour from the
> X32...but, I'm wondering if I'm missing something simple, or this is just
> the way this particular combo of hardware is going to work.
>
> Trouble shooting suggestions? Or, just leave it as an unsolved mystery? ;)
>
> Regards,
> Mac
>
>
>
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For these integrated intel/realtek things in Lenovo/Dell Laptops, I
noticed, that jack hangs on full duplex when your internal microphone is
disabled in your BIOS/UEFI configuration. Maybe that is the cause here.

Greetings

Markus

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Received on Thu Dec 22 12:15:01 2016

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