Some problems with two 1010LTs (pcm_multi & jackd)

["Petter Sundlöf" <petter.sundlof@findus.dhs.org>]

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Hello.

I've added a second 1010LT in my studio box. The two LTs are card1 and 
card2.
Following the steps from 
http://www.sound-man.co.uk/linuxaudio/ice1712multi.html I created the 
.asoundrc (and modified it to hw:1 and 2 where appropriate. I have 
attached this file.
I then proceeded to patch jack 0.100.7 (release tarball) with the 
MMAP_COMPLEX patch. This was installed to the /usr/ prefix.

I then downloaded alsa-lib-1.0.10 (release) and applied pcm_multi-patch. 
I installed this over the existing alsa-lib, into prefix /usr/lib.

After this I tried to run jackd -d alsa -r44100 -p512 -C multi_capture 
-P multi_playback

I then get this stdout message:

jackd 0.100.7
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.
loading driver ..
creating alsa driver ... 
multi_playback|multi_capture|1024|2|48000|0|0|nomon|swmeter|-|32bit
configuring for 48000Hz, period = 1024 frames, buffer = 2 periods
nperiods = 2 for capture
nperiods = 2 for playback

I then start Ardour and open a session. I place the playhead somewhere 
and try to start playback. Nothing happens. After a few seconds, Ardour 
is disconnected from JACK, and I receive this in jackd's stdout:

ALSA: poll time out, polled for 17416024 usecs
DRIVER NT: could not run driver cycle
jack main caught signal 12
no message buffer overruns

Clues?

Info: Kernel 2.6.14-0.10.rrt.rhfc4.ccrma #1 PREEMPT
Cards are not connected via S/PDIF or World clock -- don't have any such 
cables, and besides, I read it isn't working _yet_ with LT cards.
Hardware: Sempron 2600, 1GB RAM.
Software: Fedora Core 4 + CCRMA.

Any tips appreciated.

Thanks in advance,
Petter Sundlöf

[-- Attachment #2: .asoundrc --]
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# .asoundrc for two Delta 1010s
#
# Create virtual devices out of multiple soundcards.
# JACK will need MMAP_COMPLEX support to use this. 
# ICE1712 chip has 12 capture channels and 10 playback channels.
# No. of channels in slaves must equal 12 for capture and 10 for playback
# otherwise "invalid argument" errors result.

pcm.multi_capture {
	type multi
	slaves.a.pcm hw:1 
	slaves.a.channels 12
	slaves.b.pcm hw:2
	slaves.b.channels 12

# First 8 channels of first soundcard (capture)
 	bindings.0.slave a
 	bindings.0.channel 0
 	bindings.1.slave a
 	bindings.1.channel 1
 	bindings.2.slave a
 	bindings.2.channel 2
 	bindings.3.slave a
 	bindings.3.channel 3
 	bindings.4.slave a
 	bindings.4.channel 4
 	bindings.5.slave a
 	bindings.5.channel 5
 	bindings.6.slave a
 	bindings.6.channel 6
 	bindings.7.slave a
 	bindings.7.channel 7
    
# First 8 channels of second soundcard (capture)
 	bindings.8.slave b
 	bindings.8.channel 0
 	bindings.9.slave b
 	bindings.9.channel 1
 	bindings.10.slave b
 	bindings.10.channel 2
 	bindings.11.slave b
 	bindings.11.channel 3
 	bindings.12.slave b
 	bindings.12.channel 4
 	bindings.13.slave b
 	bindings.13.channel 5
 	bindings.14.slave b
 	bindings.14.channel 6
 	bindings.15.slave b
 	bindings.15.channel 7

# S/PDIF section. Comment out if not required.

# S/PDIF first soundcard (capture)
 	bindings.16.slave a
 	bindings.16.channel 8
 	bindings.17.slave a
 	bindings.17.channel 9
    
# S/PDIF second soundcard (capture)
 	bindings.18.slave b
 	bindings.18.channel 8
 	bindings.19.slave b
 	bindings.19.channel 9
}

ctl.multi_capture {
	type hw
	card 1
}

pcm.multi_playback {
	type multi
	slaves.a.pcm hw:1
	slaves.a.channels 10
	slaves.b.pcm hw:2
	slaves.b.channels 10

# First 8 channels of first soundcard (playback)
 	bindings.0.slave a
 	bindings.0.channel 0
 	bindings.1.slave a
 	bindings.1.channel 1
 	bindings.2.slave a
 	bindings.2.channel 2
 	bindings.3.slave a
 	bindings.3.channel 3
 	bindings.4.slave a
 	bindings.4.channel 4
 	bindings.5.slave a
 	bindings.5.channel 5
 	bindings.6.slave a
 	bindings.6.channel 6
 	bindings.7.slave a
 	bindings.7.channel 7

# First 8 channels of second soundcard (playback)
 	bindings.8.slave b
 	bindings.8.channel 0
 	bindings.9.slave b
 	bindings.9.channel 1
 	bindings.10.slave b
 	bindings.10.channel 2
 	bindings.11.slave b
 	bindings.11.channel 3
 	bindings.12.slave b
 	bindings.12.channel 4
 	bindings.13.slave b
 	bindings.13.channel 5
 	bindings.14.slave b
 	bindings.14.channel 6
 	bindings.15.slave b
 	bindings.15.channel 7

# S/PDIF section. Comment out if not required.

# S/PDIF first soundcard (playback)
 	bindings.16.slave a
 	bindings.16.channel 8
 	bindings.17.slave a
 	bindings.17.channel 9
    
# S/PDIF second soundcard (playback)
 	bindings.18.slave b
 	bindings.18.channel 8
 	bindings.19.slave b
 	bindings.19.channel 9
}

ctl.multi_playback {
	type hw
	card 1
}