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

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??