28 Jul
2012
28 Jul
'12
5:48 p.m.
On Sat, Jul 28, 2012 at 11:30 AM, Iain Mott <mott(a)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).