[GIS] QGIS removed after updating to 2.18.5 on ubuntu

installationqgisubuntugis

After updating to QGIS 2.18.5 using ubuntugis ppa my QGIS 2.18.4 installation was removed and I get an error about unmet dependencies when I try to install QGIS at the terminal:

The following packages have unmet dependencies:
python-qgis : Depends: python-future but it is not installable
E: Unable to correct problems, you have held broken packages.

I have seen similar posts like this and this on SE, but they were not able to resolve my issue. I have python-future installed in python 2.7, but I still cannot install QGIS. How might I resolve this problem? I have also tried installing the LTR, but this results in an even longer list of unmet dependencies. My OS is Linux Mint 17.3 (Ubuntu 14.04).

Best Answer

This is indeed a bug in the QGIS installer, and already has a ticket: http://hub.qgis.org/issues/16383

For the moment, only QGIS-LTR is running on trusty. You have to remove and purge the packages of QGIS 2.18 to avoid versioning conflicts: https://askubuntu.com/questions/187888/what-is-the-correct-way-to-completely-remove-an-application

Or consider upgrading to Linux Mint 18.1, which is based on xenial. The missing packages are available for that.

Installing python-future with pip does not help, since the package manager does not see that.

UPDATE

The ticket has been closed as fixed. Everything should be back to normal now.

Related Solutions

QGIS, PostgreSQL, PostGIS – Fixing Broken Packages and Unmet Dependencies on Ubuntu 14.04

I had faced a similar problem installing qgis. I finally got it installed using aptitude package manager.

Try this first:

sudo apt-get update then sudo apt-get -f install.

If that doesn't work try the higher level package manager aptitude.

sudo aptitude install qgis python-qgis qgis-plugin-grass

It gives multiple solutions like this and you can select one.

Accept this solution? [Y/n/q/?] n
The following actions will resolve these dependencies:

      Downgrade the following packages:                                                                    
1)      libqt4-declarative [4:4.8.7+dfsg-7ubuntu1~xenialoverlay1~1 (now) -> 4:4.8.7+dfsg-5ubuntu2 (xenial)]
2)      libqt4-network [4:4.8.7+dfsg-7ubuntu1~xenialoverlay1~1 (now) -> 4:4.8.7+dfsg-5ubuntu2 (xenial)]    
3)      libqt4-opengl [4:4.8.7+dfsg-7ubuntu1~xenialoverlay1~1 (now) -> 4:4.8.7+dfsg-5ubuntu2 (xenial)]     
4)      libqt4-script [4:4.8.7+dfsg-7ubuntu1~xenialoverlay1~1 (now) -> 4:4.8.7+dfsg-5ubuntu2 (xenial)]     
5)      libqt4-sql [4:4.8.7+dfsg-7ubuntu1~xenialoverlay1~1 (now) -> 4:4.8.7+dfsg-5ubuntu2 (xenial)]        
6)      libqt4-sql-sqlite [4:4.8.7+dfsg-7ubuntu1~xenialoverlay1~1 (now) -> 4:4.8.7+dfsg-5ubuntu2 (xenial)] 
7)      libqt4-svg [4:4.8.7+dfsg-7ubuntu1~xenialoverlay1~1 (now) -> 4:4.8.7+dfsg-5ubuntu2 (xenial)]        
8)      libqt4-xml [4:4.8.7+dfsg-7ubuntu1~xenialoverlay1~1 (now) -> 4:4.8.7+dfsg-5ubuntu2 (xenial)]        
9)      libqt4-xmlpatterns [4:4.8.7+dfsg-7ubuntu1~xenialoverlay1~1 (now) -> 4:4.8.7+dfsg-5ubuntu2 (xenial)]
10)     libqtcore4 [4:4.8.7+dfsg-7ubuntu1~xenialoverlay1~1 (now) -> 4:4.8.7+dfsg-5ubuntu2 (xenial)]        
11)     libqtdbus4 [4:4.8.7+dfsg-7ubuntu1~xenialoverlay1~1 (now) -> 4:4.8.7+dfsg-5ubuntu2 (xenial)]        
12)     libqtgui4 [4:4.8.7+dfsg-7ubuntu1~xenialoverlay1~1 (now) -> 4:4.8.7+dfsg-5ubuntu2 (xenial)]         


Accept this solution? [Y/n/q/?] y
The following packages will be DOWNGRADED:
  libqt4-declarative libqt4-network libqt4-opengl libqt4-script libqt4-sql libqt4-sql-sqlite libqt4-svg libqt4-xml libqt4-xmlpatterns libqtcore4 libqtdbus4 libqtgui4 
The following NEW packages will be installed:
  libdrm-dev{a} libfcgi0ldbl{a} libgl1-mesa-dev{a} libglade2-0{a} libglu1-mesa-dev{a} libjs-jquery-ui{a} libjs-leaflet{a} liblwgeom-dev{a} libqca2{a} libqca2-plugin-ossl{a} libqca2-plugins{a} 
  libqgis-analysis2.18.3{a} libqgis-app2.18.3{a} libqgis-core2.18.3{a} libqgis-customwidgets{a} libqgis-gui2.18.3{a} libqgis-networkanalysis2.18.3{a} libqgis-server2.18.3{a} libqgisgrass7-2.18.3{a} 
  libqgispython2.18.3{a} libqjson0{a} libqt4-dbus{a} libqt4-designer{a} libqt4-dev{a} libqt4-dev-bin{a} libqt4-help{a} libqt4-opengl-dev{a} libqt4-qt3support{a} libqt4-scripttools{a} libqt4-test{a} 
  libqtassistantclient4{a} libqwt5-qt4{a} libspatialindex4v5{a} libx11-xcb-dev{a} libxcb-dri2-0-dev{a} libxcb-dri3-dev{a} libxcb-glx0-dev{a} libxcb-present-dev{a} libxcb-randr0-dev{a} libxcb-render0-dev{a} 
  libxcb-shape0-dev{a} libxcb-sync-dev{a} libxcb-xfixes0-dev{a} libxdamage-dev{a} libxext-dev{a} libxfixes-dev{a} libxshmfence-dev{a} libxxf86vm-dev{a} mesa-common-dev{a} python-cycler{a} python-dateutil{a} 
  python-future{a} python-gdal{a} python-glade2{a} python-httplib2{a} python-jinja2{a} python-markupsafe{a} python-matplotlib{a} python-matplotlib-data{a} python-pygments{a} python-pyparsing{a} 
  python-pyspatialite{a} python-qgis python-qgis-common{a} python-qscintilla2{a} python-qt4{a} python-qt4-sql{a} python-shapely{a} python-sip{a} python-tz{a} python-yaml{a} qdbus{a} qgis qgis-common{a} 
  qgis-plugin-grass qgis-plugin-grass-common{a} qgis-provider-grass{a} qgis-providers{a} qgis-providers-common{a} qt4-designer{a} qt4-linguist-tools{a} qt4-qmake{a} x11proto-damage-dev{a} 
  x11proto-dri2-dev{a} x11proto-fixes-dev{a} x11proto-gl-dev{a} x11proto-xext-dev{a} x11proto-xf86vidmode-dev{a} 
The following packages are RECOMMENDED but will NOT be installed:
  qt-at-spi 
0 packages upgraded, 88 newly installed, 12 downgraded, 0 to remove and 57 not upgraded.

QGIS Installation – How to Fix QGIS Installation Fails Under Ubuntu 16.04?

Problem solved!!! The problem were in fact the missing software sources and How do I resolve unmet dependencies after adding a PPA? finally helped.

(I don't understand how I was able to install qgis16 earlier, but some mysteries have to remain unsolved...)

Best Answer

Related Solutions

QGIS, PostgreSQL, PostGIS – Fixing Broken Packages and Unmet Dependencies on Ubuntu 14.04

QGIS Installation – How to Fix QGIS Installation Fails Under Ubuntu 16.04?

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