realtek ALC3234 (dell inspiron15-3543) ubuntu 20.04.4 with low latency kernel 5.4.0 -104, jackd2 1.9.12, qjackctl 0.9.6.18 (qt 5.12.8). I start jack first with 44.1khz, 128 buffer, 2 periods, 5.8 msec. then ardour 6.9.0. and there is NO sound output. jackd2 diagram and error log below:
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