These messages tell me this is an upgrade rather than a clean install. Packages already installed on your system are of versions that can only be upgraded to 3.1 (development release) because these existing packages are a development release like 2.99 or 3.1. They do not install because you have pointed apt at the stable repositories so they are not available in those repositories.

If you have only uninstalled some packages you need to remove the ones that are generating these error messages.

When you change repos the messages change because you are installing a different version of Qgis and it needs different packages and apt will still run into the same problem that the packages already in the system are development release and can only be upgrade to another development release and do not match the stable release.

Uninstall python-qgis, qgis-providers etc. Do an apt autoremove if there is a list of packages that are no longer needed because it will probably include a lot of qgis related packages.


On 25/03/18 21:36, Idan Miara wrote:
Hi,

I am trying to install QGIS Release / Nightly-Release on Ubuntu 17.10.

I've added the repos:
deb http://qgis.org/debian artful main
deb-src http://qgis.org/debian artful main

but I get the following error while trying to apt-get it:
The following packages have unmet dependencies:
 qgis : Depends: python-qgis (= 1:3.0.1+27artful) but 1:3.1.0+git20180323+4c4e8ac+27artful is to be installed         Depends: qgis-providers (= 1:3.0.1+27artful) but 1:3.1.0+git20180323+4c4e8ac+27artful is to be installed         Depends: qgis-common (= 1:3.0.1+27artful) but 1:3.1.0+git20180323+4c4e8ac+27artful is to be installed
        Recommends: qgis-plugin-grass but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

If I try the debian-nightly-release repo I get the following error:
The following packages have unmet dependencies:
 qgis : Depends: python-qgis (= 1:3.0.0+git20180322+c312921+27artful) but 1:3.1.0+git20180323+4c4e8ac+27artful is to be installed         Depends: qgis-providers (= 1:3.0.0+git20180322+c312921+27artful) but 1:3.1.0+git20180323+4c4e8ac+27artful is to be installed         Depends: qgis-common (= 1:3.0.0+git20180322+c312921+27artful) but 1:3.1.0+git20180323+4c4e8ac+27artful is to be installed
        Recommends: qgis-plugin-grass but it is not going to be installed

Kind Regards,
Idan.


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