QTractor Will Not Start After Upgrade To Ubuntu Studio 15.10

[G M Slater]

After upgrading to Ubuntu Studio version 15.10 QTractor will no longer open. No error message, just nothing happens when I try to launch it. Has anyone else encountered this? Does anyone have any advice?

[G M Slater]

Any message on a terminal when you run 'qtractor' manually?

When I try to launch QTractror from a terminal I get the following message:

symbol lookup error: qtractor: undefined symbol: JACK_METADATA_PRETTY_NAME

[rncbc]

Any message on a terminal when you run 'qtractor' manually?

When I try to launch QTractror from a terminal I get the following message:

symbol lookup error: qtractor: undefined symbol: JACK_METADATA_PRETTY_NAME

that means that your qtractor was build against jack1 >= 0.124.0, and probably you're running jack2.

you have two options:
a. install a more generic qtractor package built against jack2-dev;
b. install/replace jack1 >= 0.124.0 et al.
dunno whether wither one or both are feasible on ubuntu studio though; i'd recommend kxstudio packages for the rescue.

hth.
byee

[G M Slater]

When I try to launch QTractror from a terminal I get the following message:

symbol lookup error: qtractor: undefined symbol: JACK_METADATA_PRETTY_NAME

that means that your qtractor was build against jack1 >= 0.123.2, and probably you're running jack2.

you have two options:
a. install a more generic qtractor build against jack2-dev;
b. install jack1 >= 0.123.2 et al.
dunno whether wither one or both are feasible on ubuntu studio though; i'd recommend kxstudio packages for the rescue.

hth.
byee

Thank you for getting back to me!
I am running the qtractor package from kxstudio already, so I will try installing jack1 >= 0.123.2.

[G M Slater]

ah, you did a partial update of the kxstudio repos.
just get everything that is pending on the updates, and restart jack.
then qtractor will work fine.

I have the latest build of qtractor and jack2 from the kxstudio repos installed, and do not have any pending updates. Unfortunately, qtractor will not start. I have tried uninstalling/re-installing but it didn't resolve the issue. I also tried installing jack1, but my system will not allow it due to an unmet dependency that can not be resolved. Do you have any other advice?

[G M Slater]

yes, make sure to run through *all* updates, if you're using a gui tool it might not be able to do it correctly.
This is what I always use:

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sudo apt-get update
sudo apt-get dist-upgrade

Running the commands you suggested only installed an update to the flash player. I tried re-installing the kxstudio repositories, but nothing has changed. Do you have any other suggestions?

[G M Slater]

yes, purge the old kxstudio repo configs. very likely something got broken during the OS upgrade.

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sudo apt-get purge kxstudio-repos kxstudio-repos-gcc5

then re-add the kxstudio repos again.

I purged the old kxstudio repo configs, then re-added them. This did not make any difference. My installation of jack2 is 6:1.9.10~git20140122-1+kxstudio~raring1. For jack1 I have the following version available: 2:0.124.2~20150719-1~wiley3, but when I try to install it I get the following message:
Could not mark all packages for installation or upgrade
jackd1:
Depends: libjack0 (2:0.124.2~20150719-1~wiley3) but 6:1.9.10~git20140122-1+kxstudio~raring1 is to be installed.

Do you have any other advice?

[G M Slater]

yes, keep forcing the install until it lets you do that.
ie, do 'sudo apt-get install jackd2' and if it fails add the complained package to the end of the command, like:
sudo apt-get install jackd2 libjack-jackd2-0
keep going until you it either forces the install or gives a final unrecoverable error.
I suspect it will let you install. if not, paste here the final error.

I already have jack2 installed. I am assuming that you meant to say I should force the install of jack1?

[G M Slater]

no, that was on purpose. the version you have of jack2 is older.
but forcing jack1 install might be good too, that way test if updates are really working.

Trying to install jackd2 from the terminal:
sudo apt-get install jackd2
Reading package lists... Done
Building dependency tree
Reading state information... Done
jackd2 is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Trying to install jackd1 from the terminal:
sudo apt-get install jackd1 libjack0
Reading package lists... Done
Building dependency tree
Reading state information... Done
libjack0 is already the newest version.
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
jackd1 : Depends: libjack0 (= 2:0.124.2~20150719-1~wily3) but 6:1.9.10~git20140122-1+kxstudio1~raring1 is to be installed
Recommends: jackd1-firewire but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

[G M Slater]

ok, so like I said add the new package at the end. so,
sudo apt-get install jackd1 libjack0

sudo apt-get install jackd1 libjack0
Reading package lists... Done
Building dependency tree
Reading state information... Done
libjack0 is already the newest version.
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
jackd1 : Depends: libjack0 (= 2:0.124.2~20150719-1~wily3) but 6:1.9.10~git20140122-1+kxstudio1~raring1 is to be installed
Recommends: jackd1-firewire but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

I am also curious as to why when I try to re-install jack2d I am being told it is already the latest version, when it is from raring. Do you know what would cause that?

[G M Slater]

the jack2 wily version doesn't build right now.

btw, did you enable the gcc5 variant of the repos?
it's needed for ubuntu >= 15.04

I don't really know how you got the jack1 version as 6:1.9.10~git20140122-1+kxstudio1~raring1.
I stopped overriding the jack version to jack2 on 12.04.

this might be a bit tricky to solve, but the solution will for sure be to install jack1 first.

perhaps this?

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sudo apt-get install jackd1=2:0.124.2~20150719-1~wily3 libjack0=2:0.124.2~20150719-1~wily3

Success! QTractor now starts... One quick question. Should I uninstall jack2 or leave both it and jack1 installed. Will having both cause a conflict? When I use Cadence to automatically connect to jack will it automatically sort things out?

[G M Slater]

it should not be possible to have both installed.
but errm, if things are working now leave them until you need to change something.

A HUGE thank you for all of your expert help in getting this issue resolved! A quick note in case this comes up again - instead of leaving both jack1 and jack2 installed, I went ahead and uninstalled jack2. Everything appears to be working normally...