Linux Mint 18.1 KDE Edition (only) - Cura 2.4 is missing Python3 - but Python3 is installed

[ndimensional 7]

Hi, when trying to install Cura 2.4 PPA to Linux Mint 18.1 I get the error message from the "apt install cura" command:

"... could not be installed...

The following packages have unresolved dependencies:

cura : depends on: python3-uranium but should not be installed"

Well, the following python packages ARE installed:

Python 2.7.12 AND Python 3.5.2

The standard/ default python is the 2.7.12 ...

all versions checked by commands "Python3 -V" "Python2 -V" and "Phyton -V"

So how can I make cura using the installed Python 3? Or is there another thing I am missing? I dont want to replace the default Python2 by Python3 since there may be dependencies in the whole rest of the programs and system to Python2.....

Anyone any idea?

Edited March 31, 2017 by Guest

[nallath 1,098]

The PPA is not officially supported by us. The appimage that we distribute should work fine.

I've sent a mail to the guy that made the PPA so he can have a look at it

[ndimensional 7]

Thank you! Well sorry for this, was not aware of the Appimage - tried and it works, Again thanky you so much!

[thopiekar 46]

Hey, if you still like to use the PPA, then just provide full outputs for the errors you get.

Also on which Ubuntu LTS is Mint 18.1 based on?

Need all the info to understand what is going wrong on you side

[ndimensional 7]

Well, would like to continue to use the PPA - so here we go:

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

Linux Mint 18.1 KDE Edition

Based on Ubuntu 16.04

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Unfortunately I have chosen German a s system language, so the output is in German - will try to create an English version additionally:

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

xxxxxx@Tower-Mint ~ $ su

Passwort:

Tower-Mint xxxxxx # apt update

Ign:2 http://ftp-stud.hs-esslingen.de/pub/Mirrors/packages.linuxmint.com'>http://ftp-stud.hs-esslingen.de/pub/Mirrors/packages.linuxmint.com'>http://ftp-stud.hs-esslingen.de/pub/Mirrors/packages.linuxmint.com'>http://ftp-stud.hs-esslingen.de/pub/Mirrors/packages.linuxmint.com serena InRelease

OK:3 http://archive.canonical.com/ubuntu xenial InRelease

OK:4 http://update.devolo.com/linux/apt stable InRelease

OK:5 http://archive.ubuntu.com/ubuntu'>http://archive.ubuntu.com/ubuntu'>http://archive.ubuntu.com/ubuntu'>http://archive.ubuntu.com/ubuntu'>http://archive.ubuntu.com/ubuntu'>http://archive.ubuntu.com/ubuntu'>http://archive.ubuntu.com/ubuntu xenial InRelease

OK:6 http://ftp-stud.hs-esslingen.de/pub/Mirrors/packages.linuxmint.com serena Release

OK:7 http://ppa.launchpad.net/danielrichter2007/grub-customizer/ubuntu xenial InRelease

Holen:8 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [102 kB]

OK:9 http://ppa.launchpad.net/freecad-maintainers/freecad-stable/ubuntu xenial InRelease

OK:10 http://ppa.launchpad.net/graphics-drivers/ppa/ubuntu xenial InRelease

OK:11 http://ppa.launchpad.net/libreoffice/ppa/ubuntu xenial InRelease

OK:12 http://ppa.launchpad.net/lightzone-team/lightzone/ubuntu xenial InRelease

Holen:13 http://security.ubuntu.com/ubuntu xenial-security InRelease [102 kB]

OK:14 http://ppa.launchpad.net/notepadqq-team/notepadqq/ubuntu xenial InRelease

OK:16 http://ppa.launchpad.net/thopiekar/cura/ubuntu xenial InRelease

Holen:17 http://archive.ubuntu.com/ubuntu xenial-backports InRelease [102 kB]

OK:18 http://ppa.launchpad.net/kubuntu-ppa/backports/ubuntu xenial InRelease

OK:19 http://ppa.launchpad.net/wfg/0ad/ubuntu xenial InRelease

OK:1 http://screenshots.getdeb.net xenial-getdeb InRelease

Es wurden 306 kB in 0 s geholt (464 kB/s).

Paketlisten werden gelesen... Fertig

Abhängigkeitsbaum wird aufgebaut.

Statusinformationen werden eingelesen.... Fertig

Aktualisierung für 6 Pakete verfügbar. Führen Sie »apt list --upgradable« aus, um sie anzuzeigen.

Tower-Mint xxxxxx # apt install cura

Paketlisten werden gelesen... Fertig

Abhängigkeitsbaum wird aufgebaut.

Statusinformationen werden eingelesen.... Fertig

Einige Pakete konnten nicht installiert werden. Das kann bedeuten, dass

Sie eine unmögliche Situation angefordert haben oder, wenn Sie die

Unstable-Distribution verwenden, dass einige erforderliche Pakete noch

nicht erstellt wurden oder Incoming noch nicht verlassen haben.

Die folgenden Informationen helfen Ihnen vielleicht, die Situation zu lösen:

Die folgenden Pakete haben unerfüllte Abhängigkeiten:

cura : Hängt ab von: python3-uranium soll aber nicht installiert werden

E: Probleme können nicht korrigiert werden, Sie haben zurückgehaltene defekte Pakete.

Tower-Mint xxxxxx #

[thopiekar 46]

I'm German, so thats no problem.

Next time just put "LANG=C" in front of your command. It will make your application return everything in English (default programming language).

Please post the output of "sudo apt install python3-uranium".

Thanks!

[ndimensional 7]

Here the output - so what I understand now, that Python 3.5.2 is NOT Python3-uranium right? And that seems to be the problem?

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

xxxxxx@Tower-Mint ~ $ LANG=C sudo apt install python3-uranium

[sudo] password for xxxxxx:

Reading package lists... Done

Building dependency tree

Reading state information... Done

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:

python3-uranium : Depends: python3-pyqt5 but it is not going to be installed

Depends: python3-pyqt5.qtopengl but it is not going to be installed

Depends: python3-pyqt5.qtquick but it is not going to be installed

Depends: python3-pyqt5.qtsvg but it is not going to be installed

E: Unable to correct problems, you have held broken packages.

xxxxxx@Tower-Mint ~ $ python -V

Python 2.7.12

xxxxxx@Tower-Mint ~ $ python3 -V

Python 3.5.2

xxxxxx@Tower-Mint ~ $

Regards

[amedee 349]

There is something wrong with your environment, it is not fully up-to-date.

You should run an 'apt-get update' and an 'apt-get dist-upgrade' to get a consistent environment.

[thopiekar 46]

What is the output when trying to install python3-pyqt5?

I wouldn't say it is about updates. Guess it is more about something that was upgraded or changed at the basic python packages by the Mint developers. Currently I have not the time to look on my own for the reason why it fails, but if someone can show me the true (detailed) reason, then I can maybe help

[amedee 349]

He has "broken packages", means he is not on a coherent dist.

Trying to solve anything before he he gets a consistent system is a waste of time...

[thopiekar 46]

Ok, overlooked this message somehow.

What's needed is a "apt update; apt-get install -f; apt-get dist-upgrade" here. However, looking for the reason like I was planning to do would at the end point at the troubling package I think.

[amedee 349]

Yes, absolutely -- I would do exactly the same to find which dependency is really missing or broken. Just wanted to stress that we need to start from a 'sane' situation...

[ndimensional 7]

OK, did it (update, install -f, dist-upgrade) once - could not find anything in the output which has "pyth*" in, but upgraded 6 packages.... .

Then did it (update, install -f, dist-upgrade) again and all seems to be o.k. - see below

Then tried again apt-install cura - still same error rg dependency to python3-uranium. Still same two python version installed, still Python2xx standard.

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

xxxxxx@Tower-Mint ~ $ su

Passwort:

Tower-Mint xxxxxx # LANG=C apt update

Ign:1 http://ftp-stud.hs-esslingen.de/pub/Mirrors/packages.linuxmint.com'>http://ftp-stud.hs-esslingen.de/pub/Mirrors/packages.linuxmint.com'>http://ftp-stud.hs-esslingen.de/pub/Mirrors/packages.linuxmint.com'>http://ftp-stud.hs-esslingen.de/pub/Mirrors/packages.linuxmint.com serena InRelease

Hit:3 http://update.devolo.com/linux/apt stable InRelease                                

Hit:4 http://archive.canonical.com/ubuntu xenial InRelease                                

Get:5 http://security.ubuntu.com/ubuntu xenial-security InRelease [102 kB]                

Hit:6 http://ftp-stud.hs-esslingen.de/pub/Mirrors/packages.linuxmint.com serena Release    

Hit:7 http://archive.ubuntu.com/ubuntu'>http://archive.ubuntu.com/ubuntu'>http://archive.ubuntu.com/ubuntu'>http://archive.ubuntu.com/ubuntu'>http://archive.ubuntu.com/ubuntu'>http://archive.ubuntu.com/ubuntu'>http://archive.ubuntu.com/ubuntu xenial InRelease                                    

Hit:8 http://ppa.launchpad.net/danielrichter2007/grub-customizer/ubuntu xenial InRelease  

Get:9 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [102 kB]                  

Hit:10 http://ppa.launchpad.net/freecad-maintainers/freecad-stable/ubuntu xenial InRelease

Hit:11 http://ppa.launchpad.net/graphics-drivers/ppa/ubuntu xenial InRelease              

Hit:13 http://ppa.launchpad.net/libreoffice/ppa/ubuntu xenial InRelease                  

Hit:14 http://ppa.launchpad.net/lightzone-team/lightzone/ubuntu xenial InRelease          

Get:15 http://archive.ubuntu.com/ubuntu xenial-backports InRelease [102 kB]              

Hit:16 http://ppa.launchpad.net/notepadqq-team/notepadqq/ubuntu xenial InRelease          

Hit:17 http://ppa.launchpad.net/thopiekar/cura/ubuntu xenial InRelease                    

Hit:2 http://screenshots.getdeb.net xenial-getdeb InRelease              

Hit:18 http://ppa.launchpad.net/kubuntu-ppa/backports/ubuntu xenial InRelease

Hit:19 http://ppa.launchpad.net/wfg/0ad/ubuntu xenial InRelease

Fetched 306 kB in 0s (473 kB/s)                  

Reading package lists... Done

Building dependency tree      

Reading state information... Done

All packages are up to date.

Tower-Mint xxxxxx # LANG=C apt-get install -f

Reading package lists... Done

Building dependency tree      

Reading state information... Done

0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Tower-Mint xxxxxx # LANG=C apt-get dist-upgrade

Reading package lists... Done

Building dependency tree      

Reading state information... Done

Calculating upgrade... Done

0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Tower-Mint xxxxxx #

LANG=C apt install cura

Reading package lists... Done

Building dependency tree      

Reading state information... Done

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:

cura : Depends: python3-uranium but it is not going to be installed

E: Unable to correct problems, you have held broken packages.

Tower-Mint xxxxxx #

Edited March 29, 2017 by Guest

[amedee 349]

That would be the next step:

 

What is the output when trying to install python3-pyqt5?

 

[ndimensional 7]

Tower-Mint xxxxxx # LANG=C apt install python3-pyqt5

Reading package lists... Done

Building dependency tree

Reading state information... Done

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:

python3-pyqt5 : Depends: qtbase-abi-5-5-1

E: Unable to correct problems, you have held broken packages.

Tower-Mint xxxxxx # LANG=C apt install qtbase-abi-5-5-1

Reading package lists... Done

Building dependency tree

Reading state information... Done

Package qtbase-abi-5-5-1 is a virtual package provided by:

libqt5core5a 5.5.1+dfsg-16ubuntu7.2 [Not candidate version]

libqt5core5a 5.5.1+dfsg-16ubuntu7 [Not candidate version]

E: Package 'qtbase-abi-5-5-1' has no installation candidate

Tower-Mint xxxxxx #

[amedee 349]

Strange...

I made a quick install of Mint 18.1 (Cinnamon) and python3-pyqt5 does not install qtbase-abi.

Install from PPA runs like a breeze:

I believe something else is installed on your system which requires incompatible version

What does "dpkg -l qtbase*" gives on your system?

[ndimensional 7]

xxxxxx@Tower-Mint ~ $ LANG=C dpkg -l qtbase*

Desired=Unknown/Install/Remove/Purge/Hold

| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend

|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)

||/ Name Version Architecture Description

+++-================-=============-=============-======================================

un qtbase-abi-5-6-1 (no description available)

un qtbase5-dev-tool (no description available)

xxxxxx@Tower-Mint ~ $

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

But if this - at it looks like - is really only affecting me, I am appreciating your help but we should not waste too much of your time for root cause analysis which will take quite some time as it seems - at the end the Appimage runs.... Only due to consistency I would prefer to use the PPA, but not solving the problem would now not be a show stopper ....... so I would fully understand and agree if we stop here .....

[amedee 349]

Here is what I think: you have quite some PPA's in your list; one of them probably pulled qt 5.6 from backports (this one in "hit 18" in your last update).

Cura wants python3-pyqt5 which relies on qt 5.5 (default in Min 18.1) and this is where it breaks!

Just FYI, on my default install I have:

 

after8 ~ # dpkg -l qtbase*Desired=Unknown/Install/Remove/Purge/Hold| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)||/ Name           Version      Architecture Description+++-==============-============-============-=================================un  qtbase-abi-5-5        (no description available)

 

Just my view, let's wait if @thopiekar has not a better idea...

[thopiekar 46]

The only reason I see is that @ndimensional is/was using another PPA with eg. KDE updates, so packages with more recent Qt libraries were included.

One mistake is often that people think that disabling a PPA reverts all upgraded packages, but in fact you have a system with mixed (and unmaintained) packages.

If this is the case then re-enabled the PPA you were using before and purge it with "ppa-purge" or use apt-pinning methods to downgrade all packages to a version, which are available in at least one of your repositories.

So yeah, there are different ways to repair a system, which is in your broken state

[ndimensional 7]

Well, seems that my system is not broken, but the problem is the "Linux Mint 18.1 KDE Edition" in general - or you take the KDE edition as broken 8^(

Checked the "hit 18" relating to kubuntu-ppa/backports. So I was wondering about the referral to "kubuntu", then it became clear to me: I am using the "Linux Mint 18.1 KDE Edition"version:

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

KDE-Plasma-Version:5.8.5

KDE-Frameworks-Version:5.28.0

Qt-Version:5.6.1

Kernel-Version:4.4.0-64-generic

64Bit OS

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

and it has this from the beginning.

Looking via Synaptic at the installed files for "kubuntu-ppa-backports" there are some KDE modules/parts with a referral to different QT modules....

Also this is as the single additional PPA source in a clean MINT-KDE installation without any additional software installed. I tried now to install cura on a newly installed, clean system- only KDE. And see, same error. Then I tried the same for a Cinnamon edition - and NO error.

So it is the basic Linux Mint KDE Edition which produces the problem....

[thopiekar 46]

Well, if you want a KDE desktop then install Kubuntu directly. I don't think the Kubuntu developers care about any Mint installation

[ndimensional 7]

Well, at least ntohing we can do here in this forum. Will check in the according Mint forums if the python problem in Mint KDE may be solved.

Thank all of you for your help with this!

[thopiekar 46]

No problem. Good luck in solving your problem

[ndimensional 7]

So just to be complete: I created clean systems for each version of Linux Mint 18.1 and installed only cura. Results:

Cinnamon - success

Mate - success

Xfce - success

KDE - fail

I think this proves that the problem is KDE related. So we will see if it will/can be solved by the KDE experts in the Linux Mint forums.... (forums.linuxmint.com - desktops - KDE - Link: "https://forums.linuxmint.com/viewtopic.php?f=56&t=242763"

Edited March 31, 2017 by Guest

[thopiekar 46]

Well, in my point of view it is a prove that the KDE people at Linux Mint are doing things wrong

Edited March 31, 2017 by Guest