[03:33] <jkasha>  Hi looking for help. :)  My DAW was working great.  After an Ubuntu update and reboot, qjackctl stopped seeing my USB-sound card (a Soundcraft MTK12).  Going crazy to understand why.  Doesn't appear in "readable" or "writable" clients in qjackctl Connections.  But the USB sound device does appear when I do aplay -l.  Ubuntu 19.10.  Pulse routed into jack.  Used to work great.  Ideas?
[08:29] <tomreyn> jkasha: 19.10 is about to loose support anyways, i'd just upgrade to 20.04 and look into solving it there IF it's still an issue.
[10:30] <jkasha> thank you Tomreyn.  I will try that.
[10:33] <tomreyn> you're welcome :)
[12:43] <jkasha> Tomreyn - I upgraded to Ubuntu 20.04, but I am still having same problem ... qjackctl does not list my USB soundcard (which is a Soundcraft MTK mixer/interface) in the readable/writable audio clients.  It was working perfectly until yesterday.  Upgrade to 20.04 seems not to have changed anything :(
[12:43] <jkasha> Any ideas, Tomreyn or anyone?  Thank you!
[13:41] <jkasha> hi sending S.O.S. again in case anyone can help!  My sound card (a USB-interface) stopped appearing in readable/writable clients in qjackctl.  Seems to have happend after an unnounced kernel upgrade.  I upgraded to Ubuntu 20.04 to see if it would help, but did not.  Any ideas?  Thank you!!!
[13:42] <jkasha> ... btw ... Linux recognizes the device is there.  It is listed when I do "aplay -l"
[13:42] <jkasha> seems to be a jack or qjackctl or d-bus or jack dbus or something....
[16:25] <tomreyn> jkasha: sorry, i missed your messages here
[16:26] <tomreyn> hmm, i'm afraid i won't be able to help there, i really have no clue about audio interfaces
[16:26] <tomreyn> nor about jack(d) really
[16:27] <tomreyn> if you can stay around for longer, i bet someone else will jump in. also see the /topic for more suggestion son how to find help
[16:31] <jkasha> thank you.  appreciate your help so far.  Hopefully someone else will come to my rescue!
[17:33] <jkasha> btw - a friend with a similar setup just told me he is also having similar problems.  Is it possible something went wrong for many people?  Anyone else having trouble reaching their usb-audio interface in qjackctl?  not appearing as readable/writable client?
[18:18] <tomreyn> since you say you upgraded to 20.04, i assume this can be relevant: https://wiki.ubuntu.com/FocalFossa/ReleaseNotes/UbuntuStudio https://help.ubuntu.com/community/UbuntuStudio/UbuntuStudioControls
[18:56] <OvenWerks> jkasha: in a terminal (all one line): cd /tmp && wget https://community.ardour.org/files/adevices.sh && bash ./adevices.sh |pastebinit
[19:40] <jkasha> Overnwerks - just did.  Thx for any help you can give!
[19:41] <jkasha> The device I want to use is the MTK.  It has 14 ins/outs.  It worked fine, until Fri.
[20:13] <OvenWerks> Wheres the URL that should have given?
[20:14] <jkasha> https://paste.ubuntu.com/p/XhNkVy69PX/
[20:17] <OvenWerks> I am at a loss as to why qjackctl can't see that. Have you tried ubuntustudio-controls for running jack?
[20:20] <jkasha> Yes
[20:20] <OvenWerks> BTW we have found that a rm ~/.config/jack/conf.xml after having run qjackctl can be helpful
[20:21] <jkasha> thx.  i just did rm etc.  but still same.
[20:22] <jkasha> could it have smthg to do with dbus or jack d-bus?  i get rather confused...
[20:23] <OvenWerks> in ubuntustudio-controls->audiosetup->jack master settings->USB device that should be Master ..... you can't find your device?
[20:23] <OvenWerks> -controls uses the same way for finding devices as the script you used to produce the URL above.
[20:24] <jkasha> I find the device in "USB device that should be Master", and I have it selected
[20:24] <OvenWerks> ok and then start jack button
[20:25] <OvenWerks> Then there is a button that says Carla
[20:26] <OvenWerks> when Carla opens, there is a tab called patchbay
[20:27] <OvenWerks> system:capture and playback shold be your USB device
[20:28] <jkasha> It only shows "system", which is only 2 channels, whereas my device (MTK) is 14ins/12outs (or vice versa).  And I tried to see if that even corresponds to the first two inputs on my device ... it doesn't.
[20:28] <OvenWerks> ok what does the script above show now?
[20:28] <jkasha> When it used to work, in qjackctl, my device was listed as "system," but had all the inputs & outputs and worked.
[20:28] <OvenWerks> I understand
[20:29] <OvenWerks> I am trying to figure out what happened
[20:29] <jkasha> which script?  sorry i'm confused. :)
[20:29] <jkasha> this?
[20:29] <jkasha>  cd /tmp && wget https://community.ardour.org/files/adevices.sh && bash ./adevices.sh |pastebinit
[20:29] <OvenWerks> /tmp/adevices.sh |pastebinit
[20:29] <OvenWerks> Yeah
[20:30] <jkasha> https://paste.ubuntu.com/p/4c3rZw2SCG/
[20:30] <OvenWerks> well it is your device for sure.... but why only two chanels
[20:31] <OvenWerks> Oh!, I see it.
[20:31] <OvenWerks> maybe not.
[20:31] <OvenWerks> 192000?
[20:31] <OvenWerks> why?
[20:32] <jkasha> it appeared difftly in the earlier version.... what changed
[20:32] <OvenWerks> anything above 48k is for bats
[20:32] <OvenWerks> jackdbus is now running
[20:32] <jkasha> that was there by default.  maybe that was the problem?
[20:32] <jkasha> changing to 48k, which is what i always use.
[20:33] <OvenWerks> you will have to restart Carla after hitting the apply audio settings button
[20:33] <jkasha> do you recommend Carla over qjackctl?
[20:34] <OvenWerks> many devices change chanel count with SR
[20:34] <OvenWerks> personally I don't care :) but ubuntustudio policy is that Carla is the way forward
[20:34] <OvenWerks> and Caitia when that shows up
[20:35] <jkasha> Still not showing the channels.  Will do that script again.  And btw - (if you know) in qjackctl, there is a setting for frames/period just below SR (48k)... not sure what that is.  It's set to 64, but not sure if that's good.
[20:35] <OvenWerks> I would stay away from using qjckctl to start jack, but the connections panel is still just fine
[20:36] <jkasha> https://paste.ubuntu.com/p/V88hzxz863/
[20:36] <OvenWerks> 64 should be fine...
[20:38] <OvenWerks> That looks like you started it with qjckctl.
[20:39] <jkasha> yes
[20:39] <jkasha> i'll restart from pulse and do again.
[20:39] <OvenWerks> assuming so... under advanced in settings
[20:39] <OvenWerks> there is a "Channels I/O"
[20:40] <OvenWerks> is that set to 2 by chance?
[20:40] <jkasha> no it's on default
[20:40] <OvenWerks> Ah, yes if jack is stopped,
[20:41] <OvenWerks> pavucontrol may be able to set chanels
[20:42] <OvenWerks> pavucontrol->Configureation-><your device> drop down may show more than one chanel setup
[20:42] <jkasha> so should I set that while Jack is stopped in qjackctl?  And if so, I presume I should set it to the correct number of ins/outs, right?
[20:42] <OvenWerks> yes
[20:43] <OvenWerks> if jack is running pavucontrol may not have access
[20:43] <jkasha> ok.  i'll try in qjackctl, because I'm more familiar, unless you think it's important i use pavucontrol?
[20:43] <OvenWerks> you have to use pavucontrol I think
[20:44] <OvenWerks> Unless there is a switch/control right on your device that can change number of chanels
[20:47] <jkasha> you're not gonna believe this... i just changed the usb cable and it's working.  it's the one i was using all along.  when it stopped worked, i put in a newer longer one.  i just put the older, short one back, and boom! my 14/12 channels are back.
[20:47] <OvenWerks> \o/
[20:47] <OvenWerks> good
[20:48] <jkasha> i'll do some tests to see if it actually works.  sorry to have taken up so much of your time.  much appreciate your help.  i'll let you know after I test.
[20:48] <OvenWerks> If you are used to qjackctl feel free to keep using it
[20:49] <OvenWerks> on the advanced page I would change the "Port Maximum" to 1024
[20:49] <OvenWerks> (default is 2048 but qjackctl doesn't seem to allow that)
[20:49] <OvenWerks> I think that is it for the advanced page
[20:50] <OvenWerks> In general the default settings are good
[20:51] <jkasha> https://www.youtube.com/watch?v=3GwjfUFyY6M
[20:51] <jkasha> Thank you so much!!!
[20:51] <OvenWerks> you're welcome
[21:01] <jkasha> i'm getting weird behavior nonetheless.  :(  i'm going to reboot and see if that helps.
[21:07] <jkasha> Youtube doesn't play correctly now.  for whatever reason, it was working before i did the Port Max change.  now it doesn't work, even when i set it back.
[21:07] <jkasha> or i should say, youtube won't play media.  the MTK device is there and the channels are correct.
[21:19] <jkasha> Ovenwerks ... now i can't even start jack... :(  I get an error that says "D-BUS: Jack server could not be started."
[21:19] <jkasha> my head is looping!