I'm updating on Ubuntu 14.04 , but I have these tracebacks for QGis :

Preparing to unpack .../qgis-provider-grass_2.8.4+20trusty_amd64.deb ...
dpkg-divert: error: `diversion of /usr/bin/qgis to /usr/bin/qgis.bin by qgis-provider-grass' clashes with `diversion of /usr/bin/qgis to /usr/bin/qgis.bin by qgis-plugin-grass'
dpkg: error processing archive /var/cache/apt/archives/qgis-provider-grass_2.8.4+20trusty_amd64.deb (--unpack):
subprocess new pre-installation script returned error exit status 2

and it finishes like this :

Errors were encountered while processing:
E: Sub-process /usr/bin/dpkg returned an error code (1)

2 Answers 2


I ran into the same problem with the 2.8.4 update from 2.8.3. Here's how I fixed it:

You'll notice in the traceback it says

dpkg-divert: error: `diversion of /usr/bin/qgis to /usr/bin/qgis.bin by qgis-provider-grass' clashes with `diversion of /usr/bin/qgis to /usr/bin/qgis.bin by qgis-plugin-grass'

The divert functionality of dpkg is basically just a renaming of packages. In this case, the qgis-provider-grass package is trying to rename /usr/bin/qgis to /usr/bin/qgis.bin, but it found that this renaming is clashing with a similar rule put in place by qgis-plugin-grass.

The solution is, remove the existing divert, and allow the qgis-provider-grass to put it in again. This doesn't actually break anything (in the extreme case, you can remove the divert altogether and then you'll be calling /usr/bin/qgis instead of /usr/bin/qgis.bin)

To remove the divert, run

sudo dpkg-divert --remove --rename /usr/bin/qgis

You should see a message like this

Removing 'diversion of /usr/bin/qgis to /usr/bin/qgis.bin by qgis-plugin-grass'

Also, you'll want to do the same thing for qbrowser (you'll find that if you don't, another error like the one you're seeing will pop up):

sudo dpkg-divert --remove --rename /usr/bin/qbrowser

That's it! Now, fix all the broken packages in apt (they're not actually broken, but apt thinks they are because it couldn't run the divert rule):

sudo apt-get install -f

I had the same issue.

What worked for me was to remove all qgis and grass related packages (I used synaptic, it helped me to find them).

I then made a fresh install of the ltr following the instructions on http://www.qgis.org/en/site/forusers/alldownloads.html#debian-ubuntu. I made sure to only have the deb and deb-src of http://qgis.org/debian-ltr active in the sources.list

  • I had done that. i.e autoremove qgis* and grass* . But when I install, I still have the qgis-plugin-grass and qgis-provider-grass which yields an incompatibility error. Thanks for the advice.
    – iMitwe
    Dec 2, 2015 at 13:22

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