[LAU] hdsp emergency

[Paul Davis]

On Sat, Jul 28, 2012 at 11:30 AM, Iain Mott <mott at 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 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
>

not too smart, but okay.


> Sat Jul 28 12:27:20 2012:  [1m [31mERROR: Failed to acquire device
> 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|
> 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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