Hi,
I'm running KDE Neon 5.9.4 Developer Edition. Yesterday while I was doing updates apt gave me this error:

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kio-extras : Dipende: kio-extras-data (= 4:16.12.3+p16.04+git20170412.1543-0) ma la versione 4:16.12.3+p16.04+git20170407.1138-0 è installata
 libkf5holidays5 : Dipende: libkf5holidays-data (= 16.12.3+p16.04+git20170412.1944-0) ma la versione 16.12.3+p16.04+git20170409.0155-0 è installata
E: Dipendenze non trovate. Riprovare usando -f.

I tried

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sudo apt -f install

but it gave me another error:

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dpkg: errore nell'elaborare l'archivio /var/cache/apt/archives/kio-extras-data_4%3a16.12.3+p16.04+git20170412.1543-0_all.deb (--unpack):
 trying to overwrite "/usr/share/locale/it/LC_MESSAGES/kio_mtp.mo", which is also in package kde-l10n-it 4:15.12.3-0ubuntu1.1

Anyone knows if there's a solution?

Thanks in advance.

Something seems weird:

# I've installed 64Bit 'kio-extras', as can be seen here:

$ dpkg -l | grep kio-extras
ii kio-extras 4:16.12.3-0neon+16.04+build16 amd64 Extra functionality for kioslaves.
ii kio-extras-data 4:16.12.3-0neon+16.04+build16 all Extra functionality for kioslaves data files.


# But no installed or installable 64Bit shown here (only 32Bit):
$ apt list kio-extras
Listing... Done
kio-extras/xenial 4:15.12.3-0ubuntu1 i386


# There seems to be an inconsistency between:
1) dpkg: OK
and
2) apt: not OK


# I'm using:
$ lsb_release -sd
KDE neon User Edition 5.9


Something wrong in Package Management?

Yes, I can confirm that inconsistency between dpkg and apt, same here. Maybe it's related to the dependency issue I have encountered? I don't know

Please:

Try to install 'neon-desktop',
and tell, what happens.

It tells

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neon-desktop is already the newest version (4+p16.04+git20170407.1725).

I have just tried a fresh install on a VM, and I've found that:
1 - Neon User Edition works fine;
2 - Neon Developer Edition (stable) has this bug;
3 - Changing Neon ppa from /user to /dev/stable in the Neon User Edition VM has the same proble of (2).

So this bug should affect only Developer Edition, though I didn't try the dev/unstable.

Good news!

Did You try 'apt list kio-extras' in Your new VM?

I'm still looking for answers on my system.
But, everything seems fine ('Package'-files, package cache, etc. ).

I'm clueless, as yet.



# Another strangeness:

$ command apt-cache search '^mc$'
mc - Midnight Commander - a powerful file manager

$ command apt-cache -a search '^mc$'
E: Command line option 'a' [from -a] is not understood in combination with the other options.

# but there are no "other options"…


EDIT: Addition

# this gives completely all 64Bit results, even for 'ubuntu':
$ command apt-cache madison kio-extras | grep ' Packages'
kio-extras | 4:16.12.3-0neon+16.04+build16 | http://archive.neon.kde.org/user xenial/main amd64 Packages
kio-extras | 4:16.12.2-0neon+16.04+build15 | http://archive.neon.kde.org/user xenial/main amd64 Packages
kio-extras | 4:15.12.3-0ubuntu1 | http://de.archive.ubuntu.com/ubuntu xenial/universe amd64 Packages

# But still 32Bit only:
$ apt list kio-extras
Listing... Done
kio-extras/xenial 4:15.12.3-0ubuntu1 i386

Tried

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dpkg -l | grep kio-extras

and

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apt list kio-extras

and there's still that inconsistency between amd4 and i386 packages, even on a fresh install (KDE Developer Edition Stable VM).
However, now

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apt update && apt dist-upgrade

works as expected, and I don't know why. It upgraded kio-extras, but it removed kde-l10n-it package, maybe because of this:

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dpkg: errore nell'elaborare l'archivio /var/cache/apt/archives/kio-extras-data_4%3a16.12.3+p16.04+git20170412.1543-0_all.deb (--unpack):
 trying to overwrite "/usr/share/locale/it/LC_MESSAGES/kio_mtp.mo", which is also in package kde-l10n-it 4:15.12.3-0ubuntu1.1

so this bug is kind-of solved.

It's just an hypothesis, but I think that since language packs have been available in dev/stable only for a month, maybe they go in conflict with the new framework, but I'm not sure.

Should I mark this as solved?

In aptitude, You can see that/wether kio-extras and
kde-l10n-it are incompatible. And lots of other
languages, too.

Because Your original problem existed on Dev-Edition,
I would not regard it as solved. Even if it is "kind-of" solved
on User-Edition.

Okay, then I'll change if possible the title of the topic since it's misleading.

By the way:

I do not at all think, it's correct to
overwrite files belonging to the underlying "Ubuntu LTS"-OS
with files from "KDE neon"-Desktop packages.

This way, madness is guaranteed, sooner or later.

KDE has to replace Ubuntu packages,
not to madly overwrite their files.

I guess you're right. However, since other incompatibilities with another packages like kio-gdrive occurred, I'll temporarily switch from /dev/stable to /user ppa. I'll test new updates to Developer Edition through my Neon Dev VM.

Solved with newer version of Neon Dev Stable.