Moin,

last week I updated one of my notebook, but now kmail is no longer installed. Trying to installing it again fails:

root@solaris:~# pkcon install kmail
Resolving [=========================]
Testing changes [=========================]
Finished [=========================]
Fatal error: The following packages have unmet dependencies:
kmail: Depends: libkf5mailcommon5 but it is not going to be installed
Depends: libkf5messagecomposer5 but it is not going to be installed
Depends: libkf5messageviewer5 but it is not going to be installed
Recommends: kdepim-addons but it is not going to be installed
Recommends: kdepim-themeeditors but it is not going to be installed
Recommends: mbox-importer but it is not going to be installed
Recommends: pim-data-exporter but it is not going to be installed


Any hint?

Thanks!

I don't use kmail but have just installed it without any issues. Maybe try again.

I know it may sound obvious, but did you do "pkcon refresh" before trying to install?

Moin,

waynes wrote:I know it may sound obvious, but did you do "pkcon refresh" before trying to install?

Would be nice if it were that easy
In fact, "pkcon refresh" only brings errors due to ownCloud, otherwise it looks good. I dived a little deeper and found:
kmail dependes on

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kmail -> libkf5mailcommon5 -> libkf5messageviewer5

and further ....

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Fatal error: The following packages have unmet dependencies:
  libkf5messageviewer5: Depends: libqca-qt5-2 (>= 2.3.0) but 2.1.3-2ubuntu2 is to be installed. libqca-qt5-2 is installed, but with an old version:

root@solaris:~# pkcon get-details libqca-qt5-2
Resolving                     [=========================]         More than one package matches:
1. libqca-qt5-2-2.1.3-2ubuntu2.amd64 [installed:ubuntu-bionic-universe]
2. libqca-qt5-2-2.1.3-2ubuntu2.i386 [ubuntu-bionic-universe]

but unfortunately ....

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root@solaris:~# pkcon install libqca-qt5-2
Resolving                     [=========================]         Package not found: libqca-qt5-2
Command failed: This tool could not find any available package: No packages were found

There is version 2.3.0 of this package, but I don't know what to do next

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root@solaris:~# pkcon get-packages | grep libqca-qt5-2
Installed    libqca-qt5-2-2.1.3-2ubuntu2.amd64 (installed:ubuntu-bionic-universe)
Available    libqca-qt5-2-2.1.3-2ubuntu2.i386 (ubuntu-bionic-universe)
Available    libqca-qt5-2-dbgsym-2.3.0-0xneon+18.04+bionic+build5.amd64 (user_bionic-bionic-main)
Available    libqca-qt5-2-dev-2.1.3-2ubuntu2.i386 (ubuntu-bionic-universe)
Available    libqca-qt5-2-dev-2.3.0-0xneon+18.04+bionic+build5.amd64 (user_bionic-bionic-main)
Installed    libqca-qt5-2-plugins-2.1.3-2ubuntu2.amd64 (installed:ubuntu-bionic-universe)
Available    libqca-qt5-2-plugins-2.1.3-2ubuntu2.i386 (ubuntu-bionic-universe)
Available    libqca-qt5-2-plugins-dbgsym-2.3.0-0xneon+18.04+bionic+build5.amd64 (user_bionic-bionic-main)

This is my sources list:

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root@solaris:~# grep kde -r /etc/apt/*
/etc/apt/preferences.d/99-neon-base-files:Pin: origin "archive.neon.kde.org"
/etc/apt/sources.list.d/neon.list.save:deb http://archive.neon.kde.org/user bionic main
/etc/apt/sources.list.d/neon.list.save:deb-src http://archive.neon.kde.org/user bionic main
/etc/apt/sources.list.d/neon.list:deb http://archive.neon.kde.org/user bionic main
/etc/apt/sources.list.d/neon.list:deb-src http://archive.neon.kde.org/user bionic main

How can I continue?

You've not told us which version of Neon you are using.
Assuming you are using the Neon User Edition with up to date plasma 5.18.2, there should be no issue. I have just tried now and all dependencies are fine and it installs without issue. The only thing I can think of is that You've added some ppa or repo, that may have pulled in some dependencies that conflict with Neon's software.

Moin,

waynes wrote:You've not told us which version of Neon you are using.
Assuming you are using the Neon User Edition with up to date plasma 5.18.2, there should be no issue. I have just tried now and all dependencies are fine and it installs without issue. The only thing I can think of is that You've added some ppa or repo, that may have pulled in some dependencies that conflict with Neon's software.

Well it is 5.18.2. And yes, it's true: there are a lot of PPAs on my system. Only desktop applications, but not sure that this is not the problem. I'll keep looking ...

Thanks for all your answers

To test the theory. If you boot again into the live usb that you used to install the system. Update apt and then try installing kmail, you should find it installs without any dependency problems. Might be wrong, but nearly certain it's one of your PPAs. That's the problem with external software.

This is not some PPA, the conflict is in ubuntu PPA. In case when you whish to finish successfuly kmail installation I advice to hash archive.ubuntu.com bionic in apt sources.iist file.
The reason of conflict is because in ubuntu PPA there are present old version qca packages.

Moin,

petro wrote:This is not some PPA, the conflict is in ubuntu PPA. In case when you whish to finish successfuly kmail installation I advice to hash archive.ubuntu.com bionic in apt sources.iist file.
The reason of conflict is because in ubuntu PPA there are present old version qca packages.

thanks, that helped. Thanks for the hint. Okay, kwallet doesn't work anymore, I have to search - not sure if there is a connection.
That's why kmail doesn't help me now - but it starts again

Thanks again, Greetings