[linux-audio-user] capture line in (stereo) thru jack

[francisco echeverria]

hi list:

i'm having some questions: I have a sbpci128 working under ubuntu dapper 
with no probs until i tried to record via jackit a stereo signal from an 
external mixer connected to line in at my soundcard, at this point i can 
see that capture port 2 at jack's control connection window is not 
sending any signal, i am able to record only a mono signal (L). 
strangely, when i set the ubuntu mixer to listen line-in directly, i can 
hear both channels, but when i setup to capture with jack i can only 
hear/record left one.

/proc/asound/pcm:

00-00: ES1371/1 : ES1371 DAC2/ADC : playback 1 : capture 1
00-01: ES1371/2 : ES1371 DAC1 : playback 1

Qjackctl messages window:

15:38:33.869 /usr/bin/jackd -R -p256 -dalsa -r48000 -p128 -n4 -D -Chw:0 
-Phw:0 -S -i2 -o2
15:38:33.890 JACK was started with PID=5969 (0x1751).
jackd 0.100.0
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 ..
apparent rate = 48000
creating alsa driver ... hw:0|hw:0|128|4|48000|2|2|nomon|swmeter|-|16bit
control device hw:0
configuring for 48000Hz, period = 128 frames, buffer = 4 periods
nperiods = 4 for capture
nperiods = 4 for playback

So, my question is:


Is there something that i can do or it is due to a hardware 
limitation/failure??