linuxaudio.org

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On Sat, Jul 28, 2012 at 11:30 AM, Iain Mott  wrote:
> Hi list - i have an installation that's been running for a week and has

quoted text
> suddenly failed.

>

> Uses ubuntu 11.10 and a hdsp/multiface setup. What is happening is Jack

> is failing to start

>

> There is a "D-BUS: JACK server could not be started" error when QjackCtl

>

this is confusing and misleading and just incredibly dumb. but, moving on

....
> Sat Jul 28 12:27:20 2012: JACK server starting in non-realtime mode

quoted text
>

not too smart, but okay.
> Sat Jul 28 12:27:20 2012:  [1m [31mERROR: Failed to acquire device

quoted text
> name : Audio2 error : Input/output error [0m

> Sat Jul 28 12:27:20 2012:  [1m [31mERROR: Audio device hw:DSP cannot be

> acquired, trying to open it anyway... [0m

>

ok, so device acquisition logic is just completely optional ... fine.

moving on.
> Sat Jul 28 12:27:20 2012: creating alsa driver ... hw:DSP|hw:DSP|4096|2|

quoted text
> 96000|0|0|nomon|swmeter|-|32bit

> Sat Jul 28 12:27:20 2012: configuring for 96000Hz, period = 4096 frames

> (42.7 ms), buffer = 2 periods

> Sat Jul 28 12:27:20 2012: ALSA: final selected sample format for

> capture: 32bit integer little-endian

> Sat Jul 28 12:27:20 2012: ALSA: use 2 periods for capture

> Sat Jul 28 12:27:20 2012:  [1m [31mERROR: ALSA: cannot set hardware

> parameters for capture [0m

>

and there we have the "root" of your problem. first thing to try is to

start varying the parameters and see if anything makes a different (period

size being the obvious one, but also sample rate).
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Content-Transfer-Encoding: quoted-printable
On Sat, Jul 28, 2012 at 11:30 AM, Iain M=

ott <mott@reverberant.com> wrote:

Hi list - i have an installation that's been running for a week and has=
suddenly failed.
Uses ubuntu 11.10 and a hdsp/multiface setup. What is happening is Jack

is failing to start
There is a "D-BUS: JACK server could not be started" error when Q=

jackCtlthis is confusing and misleading and just =

incredibly dumb. but, moving on ....=A0
Sat Jul 28 12:27:20 2012: JACK server starting in non-realtime modenot too smart, but okay.=A0
Sat Jul 28 12:27:20 2012: =A0[1m [31mERROR: Failed to acquire device

name : Audio2 error : Input/output error [0m

Sat Jul 28 12:27:20 2012: =A0[1m [31mERROR: Audio device hw:DSP cannot be

acquired, trying to open it anyway... [0mok, so d=

evice acquisition logic is just completely optional ... fine. moving on.=A0
Sat Jul 28 12:27:20 2012: creating alsa driver ... hw:DSP|hw:DSP|4096|2|

96000|0|0|nomon|swmeter|-|32bit

Sat Jul 28 12:27:20 2012: configuring for 96000Hz, period =3D 4096 frames

(42.7 ms), buffer =3D 2 periods

Sat Jul 28 12:27:20 2012: ALSA: final selected sample format for

capture: 32bit integer little-endian

Sat Jul 28 12:27:20 2012: ALSA: use 2 periods for capture

Sat Jul 28 12:27:20 2012: =A0[1m [31mERROR: ALSA: cannot set hardware

parameters for capture [0mand there we have the &=

quot;root" of your problem. first thing to try is to start varying the=

 parameters and see if anything makes a different (period size being the ob=

vious one, but also sample rate). 
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