[ardour-users] Problems running jack and ardour on macbookpro and debian

[Sampo Savolainen]

On Fri, 2007-05-11 at 11:54 +0200, Antonio Castellano wrote:
> i got the same error even switching from kmix and correcting my commmand:
> 
> $ /usr/bin/jackd -v -R -P89 -p1024 -dalsa -r44100 -p1024 -n2 -Phw:0
> getting driver descriptor from /usr/lib/libjack0.100.0-0/jack_dummy.so
> getting driver descriptor from /usr/lib/libjack0.100.0-0/jack_alsa.so
> getting driver descriptor from /usr/lib/libjack0.100.0-0/jack_oss.so
> jackd 0.101.1
> Copyright 2001-2005 Paul Davis and others.
> jackd comes with ABSOLUTELY NO WARRANTY
> This is free software, and you are welcome to redistribute it
> under certain conditions; see the file COPYING for details
> 
> JACK compiled with System V SHM support.
> server `default' registered
> loading driver ..
> apparent rate = 44100
> creating alsa driver ... hw:0|-|1024|2|44100|0|0|nomon|swmeter|-|32bit
> control device hw:0
> configuring for 44100Hz, period = 1024 frames, buffer = 2 periods
> nperiods = 2 for playback
> registered builtin port type 32 bit float mono audio
> required capabilities not available
> capabilities: = cap_ipc_lock,cap_sys_nice+e
> new client: alsa_pcm, id = 1 type 1 @ 0x8058450 fd = -1
> new buffer size 1024
> registered port alsa_pcm:playback_1, offset = 0
> registered port alsa_pcm:playback_2, offset = 0
> registered port alsa_pcm:playback_3, offset = 0
> registered port alsa_pcm:playback_4, offset = 0
> registered port alsa_pcm:playback_5, offset = 0
> registered port alsa_pcm:playback_6, offset = 0
> registered port alsa_pcm:playback_7, offset = 0
> registered port alsa_pcm:playback_8, offset = 0
> ++ jack_rechain_graph():
> client alsa_pcm: internal client, execution_order=0.
> -- jack_rechain_graph()
> 23595 waiting for signals
> 
> **** alsa_pcm: xrun of at least 0.028 msecs
> 
> 
> 
> **** alsa_pcm: xrun of at least 0.026 msecs
> 
> 
> i know that capture of my soundcard is not supported by the driver can 
> this cause this malfunctions? i'm giving away 300 euro for a presonus 
> firebox freebob soundcard, will i have the same problems?

How come capturing is not supported? If that's true, that's new for me.
The intel-hda driver is quite complete.

Try using the command line tool "alsamixer", press F4 to go into the
"Capture" view and make sure that the mixer element called "Capture" is
enabled for recording. You can switch the recording status via space.

(Btw. at least on my intel-hda there are two elements called "Capture",
only the other one can be and needs to be enabled for recording).

After you do this, try running jack in full duplex mode:

/usr/bin/jackd -v -R -P89 -p1024 -dalsa -r44100 -p1024 -n2 -dhw:0


  Sampo