Hello Stefan,
On 07/20/2016 07:04 PM, Stefan Lüdtke wrote:
> I use ubuntu-gis unstable and this (deb
> http://apt.postgresql.org/pub/repos/apt/ trusty-pgdg main) repo.
>
> I can either install postgis or grass and qgis, so I think the issues
> must be somehow between conflicting files between both repositories.
Yeah, I fear these two add-on-repositories are not fully compatible. I'd
suspect different versions for libgdal and/or libgeos (you might want to
check with apt-cache policy).
I don't think either repo wants to pull in all (or even just parts) of
the other, so you're currently stuck with choosing either of the two.
Kind Regards
Markus Wanner