native instruments komplete audio 6 jack issues

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vmgas
Posts: 2
Joined: Sun Jan 10, 2016 10:08 pm

native instruments komplete audio 6 jack issues

Post by vmgas »

this has always been a plug and play device for me
all of a sudden jack does not recognize it from the usb port
it is recognized by alsa according to cadence but when i check qjack it is not there and it is defaulting to the soundcard
i think i may have recently updated my low latency kernel and that could be the issue?
any ideas on solving this? it just seems strange that it will run if i choose alsa but not with jack
vmgas
Posts: 2
Joined: Sun Jan 10, 2016 10:08 pm

Re: native instruments komplete audio 6 jack issues

Post by vmgas »

im running the same setup and nothing
i also tested with an alesis io2 and that works fine
it's just the ka6.

and here is the error log::

Mon Jan 11 02:35:09 2016: Starting jack server...
Mon Jan 11 02:35:09 2016: JACK server starting in realtime mode with priority 10
Mon Jan 11 02:35:09 2016: Acquired audio card Audio1
Mon Jan 11 02:35:09 2016: creating alsa driver ... hw:K6,0|hw:K6,0|1024|2|48000|2|2|nomon|swmeter|-|32bit
Mon Jan 11 02:35:09 2016: configuring for 48000Hz, period = 1024 frames (21.3 ms), buffer = 2 periods
Mon Jan 11 02:35:09 2016: ALSA: final selected sample format for capture: 32bit integer little-endian
Mon Jan 11 02:35:09 2016: ERROR: ALSA: cannot set channel count to 2 for capture
Mon Jan 11 02:35:09 2016: ERROR: ALSA: cannot configure capture channel
Mon Jan 11 02:35:09 2016: ERROR: Cannot initialize driver
Mon Jan 11 02:35:09 2016: ERROR: JackServer::Open failed with -1
Mon Jan 11 02:35:09 2016: ERROR: Failed to open server
glowrak guy
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Re: native instruments komplete audio 6 jack issues

Post by glowrak guy »

verify that the text files /etc/security/limits.d/audio.conf
and /etc/security/limits.conf
both end like this:

@audio hard rtprio 99
@audio hard memlock unlimited
@audio hard nice -19

(The text formatting, -not the content- will be a little different than the above
due to web text weirdness)

Try this: unplug the k6
change periods-buffer in qjackctl from 2 to 3
reboot
plug in the k6, and start qjackctl
then look at the end of the text logs in /var/log
for dubious related messages

Also, google the phrase 'alsactl init'
which command may reset something the update nuked.

Also command # sudo modprobe snd_seq
Some kernels errantly fail to load it.

And uninstall pulseaudio. You can always reinstall it later, or better to have an external drive
with a pulse enabled distro if needed for skype or home theater etc

Good luck!
Pablo
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Re: native instruments komplete audio 6 jack issues

Post by Pablo »

when i check qjack it is not there and it is defaulting to the soundcard
You can always try typing "hw:K6" in the interface field, in qjackctl setup.
However, it should appear if you click on the little horizontal arrow on the right
(not necessarily in the drop down menu).

I think the error message
ERROR: ALSA: cannot set channel count to 2 for capture
happens because you selected 2 at "channels I/O". Leave that as default.
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