Strange jackd problem

david...@oca.ac.uk

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Mar 25, 2021, 3:13:55 PM3/25/21

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Hi Jacktrip folks

I have a strange issue with jackd when I try to run it as jacktrip rather than as root:

As jacktrip….

root@nanopiair:~# sudo -u jacktrip jackd -dalsa -dhw:Codec --rate 0 --period 128

jackdmp 1.9.12

jackdmp 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 server starting in realtime mode with priority 10

self-connect-mode is "Don't restrict self connect requests"

Failed to connect to session bus for device reservation: Unable to autolaunch a dbus-daemon without a $DISPLAY for X11

To bypass device reservation via session bus, set JACK_NO_AUDIO_RESERVATION=1 prior to starting jackd.

Audio device hw:Codec cannot be acquired...

Cannot initialize driver

JackServer::Open failed with -1

Failed to open server

root@nanopiair:~#

As root…

root@nanopiair:~# jackd -dalsa -dhw:Codec --rate 0 --period 128

jackdmp 1.9.12

jackdmp 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 server starting in realtime mode with priority 10

self-connect-mode is "Don't restrict self connect requests"

creating alsa driver ... hw:Codec|hw:Codec|128|2|0|0|0|nomon|swmeter|-|32bit

configuring for 0Hz, period = 128 frames (inf ms), buffer = 2 periods

ALSA: final selected sample format for capture: 32bit integer little-endian

ALSA: use 2 periods for capture

ALSA: final selected sample format for playback: 32bit integer little-endian

ALSA: use 2 periods for playback

I looked at permissions for jacktrip and it is in group “audio” so that’s OK…

Any ideas where else to look? My guess is it’s a permissions problem but I don’t know where.

David

Marcin Pączkowski

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Mar 25, 2021, 3:32:46 PM3/25/21

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Hello David,

Generally Jack2 needs dbus service to run, AFAIU, which is provided by X11. It seems that the problem with running as a different user stems from dbus here... though I might be wrong.

Supposedly setting env variable JACK_NO_AUDIO_RESERVATION=1 aims to solve the issue with dbus. Have you tried that?

Is there a reason you're not logged in as jacktrip and using a sudo instead? (not sure if that makes a difference here, just curious)

Best,

Marcin

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david...@oca.ac.uk

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Mar 25, 2021, 4:05:15 PM3/25/21

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Hi

This is on a RasberryPI lookalike. I have exports JACK_NO_AUDIO_RESERVATION=1 – it fails on both root and jacktrip if I try and start without that so I don’t think it’s X windows this time.

The reason that I need to start it with jacktrip is because that is what the jacktrip-agent starts the process as – strange thing is that this works perfectly on another Debian based ARM system; this is Ubuntu based and fails.

This seems to be an alsa-driver issue but I can’t see where…

David

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Marcin Pączkowski

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Mar 25, 2021, 4:17:16 PM3/25/21

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Thanks for the response.

My question was why not log in as jacktrip instead of sudo-ing into it?

Also, it seems that sudo starts a new environment by default, unless you pass -E supposedly. Maybe that env var was not there?

Marcin

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david...@oca.ac.uk

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Mar 25, 2021, 5:48:03 PM3/25/21

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Hi

Jacktrip is just a dummy noshell account with no login. But thanks for the pointer to passing the env var – that WORKED!

To view this discussion on the web visit https://groups.google.com/d/msgid/jacktrip-users/CAEBNZeAk-6hTbaRi3-iTQ1q4Gn7wxsgUwJKzKkUAD9VXFgxGnA%40mail.gmail.com.

Marcin Pączkowski

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Mar 25, 2021, 6:07:11 PM3/25/21

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Glad to hear!

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david...@oca.ac.uk

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Mar 27, 2021, 12:58:18 PM3/27/21

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Spoke too soon.

I am building a NanoPiAir with on-board audio card. It appears as:

**** List of PLAYBACK Hardware Devices ****

card 0: Codec [H3 Audio Codec], device 0: CDC PCM Codec-0 [CDC PCM Codec-0]

Subdevices: 0/1

Subdevice #0: subdevice #0

[1]+ Terminated journalctl -f

root@nanopiair:/etc/systemd/system# arecord -l

**** List of CAPTURE Hardware Devices ****

card 0: Codec [H3 Audio Codec], device 0: CDC PCM Codec-0 [CDC PCM Codec-0]

Subdevices: 0/1

Subdevice #0: subdevice #0

root@nanopiair:/etc/systemd/system#

When I start jackd, everything looks OK:

jacktrip 2662 1 9 16:55 ? 00:00:06 /usr/bin/jackd -dalsa -dhw:Codec --rate 48000 --period 128

But jacktrip is failing to start:

root@nanopiair:/etc/systemd/system# /usr/local/bin/jacktrip -t -z -n 2 -C jacktrip.lake.to --peerport 4464 --bindport 4464 --clientname hubserver --remotename 704a0e153cd0 -q auto -Oio

Setting buffers to zero when underrun...

---------------------------------------------------------

Cannot connect to server socket err = No such file or directory

Cannot connect to server request channel

jackdmp 1.9.12

jackdmp 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 server starting in realtime mode with priority 10

self-connect-mode is "Don't restrict self connect requests"

creating alsa driver ... hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|-|32bit

ATTENTION: The playback device "hw:0" is already in use. Please stop the application using it and run JACK again

JackTemporaryException : now quits...

Cannot initialize driver

JackServer::Open failed with -1

Failed to open server

Cannot connect to server socket err = No such file or directory

Cannot connect to server request channel

Cannot connect to server socket err = No such file or directory

Cannot connect to server request channel

Cannot connect to server socket err = No such file or directory

Cannot connect to server request channel

Cannot connect to server socket err = No such file or directory

Cannot connect to server request channel

^C

Shutting Down...

Cannot connect to server socket err = No such file or directory

Cannot connect to server request channel

jack server is not running or cannot be started

JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock

Unable to connect to JACK server

ERROR:

Maybe the JACK server is not running?

Exiting JackTrip...

I don’t understand where “hw:0” is coming from – this should be hw:Codec.

And nothing else is already using it….

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