Desktop: PPA 3.1.0 update broken dependencies on Ubuntu 20.10

[Derkades]

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The following packages have been kept back:
  dolphin-nextcloud libnextcloudsync0 nextcloud-desktop-cmd

When manually upgrading (sudo apt install dolphin-nextcloud libnextcloudsync0 nextcloud-desktop), the following happens:

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:
 nextcloud-desktop : Depends: qtbase-abi-5-12-8 but it is not installable
E: Unable to correct problems, you have held broken packages.

EDIT: This issue was not about the more recent qt version in KDE neon many other people are having problems with right now. Please see other issues referenced below.

[er-vin]

@ivaradi any idea?

[ivaradi]

@Derkades are you sure you are trying to install the package from the repository for Groovy? I still have 20.04 (Focal) and the package nextcloud-desktop indeed depends on qtbase-abi-5-12-8. However, if I check the package for Groovy, it contains a dependency on qtbase-abi-5-14-2.

[qrest]

I'm on ubuntu 20.04 using the PPA http://ppa.launchpad.net/nextcloud-devs/client/ubuntu/and getting the same error:

The following packages have unmet dependencies: nextcloud-desktop : Depends: qtbase-abi-5-12-8 but it is not installable

[Derkades]

Sorry, my bad. Still used focal instead of groovy in the apt list entry

@qrest change focal to groovy in /etc/apt/sources.list/<your nextcloud list file>

[ivaradi]

@Derkades since @qrest is on 20.04, focal should work.
@qrest could you copy here the output of the dpkg -s libqt5core5a command? libqt5core5a is the package that should provide qtbase-abi-5-12-8.

[Derkades]

Package: libqt5core5a
Status: install ok installed
Priority: optional
Section: libs
Installed-Size: 5860
Maintainer: Ubuntu Developers <[email protected]>
Architecture: amd64
Multi-Arch: same
Source: qtbase-opensource-src
Version: 5.14.2+dfsg-6
Replaces: libqtcore4 (<< 4:4.8.7+dfsg-20~)
Provides: qtbase-abi-5-14-2
Depends: shared-mime-info, libc6 (>= 2.29), libdouble-conversion3 (>= 2.0.0), libgcc-s1 (>= 3.4), libglib2.0-0 (>= 2.22.0), libicu67 (>= 67.1-1~), libpcre2-16-0 (>= 10.22), libstdc++6 (>= 5), libzstd1 (>= 1.3.2), zlib1g (>= 1:1.1.4)
Recommends: qttranslations5-l10n
Suggests: libthai0
Breaks: libqt5scintilla2-12v5 (<< 2.9.2+dfsg-2~), libqtcore4 (<< 4:4.8.7+dfsg-20~)
Description: Qt 5 core module
 Qt is a cross-platform C++ application framework. Qt's primary feature
 is its rich set of widgets that provide standard GUI functionality.
 .
 The QtCore module contains core non-GUI functionality.
Original-Maintainer: Debian Qt/KDE Maintainers <[email protected]>
Homepage: https://www.qt.io/developers/

[qrest]

As you can see I am on KDE neon (which has an ubuntu 20.04 base), which has a more up to date Qt version, maybe that is the problem.

Package: libqt5core5a
Status: install ok installed
Priority: optional
Section: libs
Installed-Size: 5625
Maintainer: Neon CI <[email protected]>
Architecture: amd64
Multi-Arch: same
Source: qtbase-opensource-src
Version: 5.15.2+dfsg-0xneon+20.04+focal+build23
Depends: shared-mime-info, libc6 (>= 2.29), libdouble-conversion3 (>= 2.0.0), libgcc-s1 (>= 3.4), libglib2.0-0 (>= 2.22.0), libicu66 (>= 66.1-1~), libpcre2-16-0 (>= 10.22), libstdc++6 (>= 10), libzstd1 (>= 1.3.2), zlib1g (>= 1:1.1.4)
Recommends: qttranslations5-l10n
Suggests: libthai0
Breaks: libqt5scintilla2-12v5 (<< 2.9.2+dfsg-2~)
Description: Qt 5 core module
 Qt is a cross-platform C++ application framework. Qt's primary feature
 is its rich set of widgets that provide standard GUI functionality.
 .
 The QtCore module contains core non-GUI functionality.
Homepage: https://www.qt.io/developers/

[ivaradi]

@qrest yes, the newer version is indeed the problem.

The Debian build control file does not refer to qtbase-abi-5-12-8 directly, this dependency (as all shared library dependencies) is generated automatically by the Debian package build infrastructure. So what I could do is perhaps to explicitly specify libqt5core5a, but I don't know if it worked at all, and even if it did, it would circumvent the automatism and maybe produce invalid packages after a while.

So this means that the PPA does not support KDE Neon, only standard Ubuntu and those derivates that do not perform such incompatible alterations. That said, maybe there is some compatibility package that does provide qtbase-abi-5-12-8. Could you execute aptitude search '~Pqtbase-abi-5-12-8' to see if it is so?

[qrest]

This is the output I get:

> aptitude search '~Pqtbase-abi-5-12-8'
i A libqt5core5a                        - Qt 5 core module                              
p   libqt5core5a:i386                   - Qt 5 core module 

I now reverted back to the non-PPA version, this works for me too.

[pbek]

I'm on ubuntu 20.04 using the PPA http://ppa.launchpad.net/nextcloud-devs/client/ubuntu/and getting the same error:

 nextcloud-desktop : Depends: qtbase-abi-5-12-8 but it is not installable

Same issue here on KDE Neon (Ubuntu 20.04) with the same aptitude search '~Pqtbase-abi-5-12-8' output like @qrest.

i   libqt5core5a                                                                                             - Qt 5 core module                                                                                                  
p   libqt5core5a:i386                                                                                        - Qt 5 core module  

My (sad) workaround was using https://github.com/nextcloud/desktop/releases/download/v3.1.0/Nextcloud-3.1.0-x86_64.AppImage.

[LightTemplar]

I have the very same problem on KDE Neon. Why is this issue still closed after so many another reports here?

[Derkades]

Other issues are being closed as duplicates of this one, but this issue is about me accidentally trying to use the focal repo on groovy.

I think a separate issue should be (re-)opened for discussion about KDE neon 20.04 compatibility.

[TimJay]

@er-vin could you re-open one of the KDE neon 20.04 focused issues, thanks 👌

[ivaradi]

The original report was about the client on standard Ubuntu 20.10, and it turned out that the wrong distribution from the PPA repo was used.

The issues about KDE neon are not something I can do much about as I have explained here: https://github.com/nextcloud/desktop/issues/2711#issuecomment-745169022 .