[LAU] Jack fails in QJackCtl but not in command line

Anton Curl curl.anton at gmail.com
Sun May 3 22:09:06 UTC 2015

On 03/05/2015 22:45, Len Ovens wrote:
> On Sun, 3 May 2015, Anton Curl wrote:
>> Some news:
>> I reinstalled jackd1 instead of jackd2. QJackCtl now runs jack 
>> without error. But
>> ladiconf depends on jackd2. So I can't use Gladish, which is very 
>> annoying for
>> me.
>> Furthermore, Puleaudio sink and source are no more created 
>> automatically in Jack.
>> I have to add supplementary lines in /etc/pulse/default.pa, then kill 
>> Pulseaudio,
>> and when it restarts, it appears in jackd connections. It's also not 
>> very
>> practical.
> With jack2, I have found chmod -x /usr/bin/jackd helps. jackd does not 
> do auto-pulse or gladish either anyway. What that leaves is jackdbus 
> which is what qjackctl starts.
Is there other differences between runing jackd with command line and 
with QJackCtl ?
> You can also play with jack_control for trouble shooting.
> jack_control ds alsa dps capture hw:5,1 dps playback hw:5,0 dps \
>     rate 44100 dps period 256 dps nperiods 2 dps midi-driver seq \
>     ep realtime-priority 80 start
> Should give you the same thing as the command below... but run 
> jackdbus instead.
With this command it's like with QJackCtl. jackd starts with hw:5,1 for 
capture and playback.
>> On 02/05/2015 23:51, Anton Curl wrote:
>>       Hi everyone!
>>       To launch jack I run:
>>             /usr/bin/jackd -P80 -dalsa -r44100 -p256 -n2 -Xseq -D
>>             -Chw:5,1 -Phw:5,0
> Ya, I know that is a long command line  :)
> Personally, I would remove the dps midi-driver seq (-Xseq) and add the 
> command:
> a2j_control ehw start
> But that is personal preference. You may have a better idea than I why 
> you want seq.
It was a mistake, I don't know why I had this -Xseq option.

Oh! Now it works again...
I don't know what I've changed but jackd starts on hw:5,0 as playback 
and hw:5,1 as capture with QJackCtl and Gladish.
I'm very confused. I just hope it will keep working when I'll reboot.

Anton Curl

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