Keep in mind when using PPAs you can easily remove them with ppa-purge (see #4 on https://itsfoss.com/how-to-remove-or-delete-ppas-quick-tip/ )
You might need to drop your PPAs, revert back to the default versions of QGIS, then add back in the repos you need. Thanks, Alex On 2/24/20 9:58 AM, J. M wrote: > Hi Ismail! > > Many thanks for your advice; I'll check it out. I haven't actually had a > chance to sit down and try to purge QGIS and start again. Andre was trying > to help me but I wasn't sure where to start so I haven't tried since I last > inquired about the process! > > Thanks a lot, > Jimi. > > On Sun, Feb 23, 2020 at 8:59 AM Ismail Sunni <imajimat...@gmail.com> wrote: > >> Hi Jimi, >> >> I have a similar problem. I fix it by reinstalling gdal (libgdal20). I can >> install QGIS again after that. But, I am not an expert with this package >> manager thing, so perhaps it can work for you also, or perhaps not :) >> >> While trying to fix my problem, I found this >> https://askubuntu.com/questions/140246/how-do-i-resolve-unmet-dependencies-after-adding-a-ppa >> which >> probably useful for you. >> >> Best regards >> >> On Thu, Feb 20, 2020 at 1:22 PM J. M <jimimc...@gmail.com> wrote: >> >>> Hi again Andre, >>> >>> Thanks for that, I more or less get what you mean. The problem is that >>> when I ran autoremove it came back with almost a gig of dependencies it >>> wanted to remove, so I cancelled it! QGIS wasn't the last program I >>> installed so I have no idea how to purge only the dependencies directly >>> related to the previous version of it I was running. If I run autoremove >>> and it damages other applications or makes my system unusable then I won't >>> be able to fix it (I'm only a user, I've got no background in programming). >>> I read around and people warned strongly against doing this unless you're >>> sure what you want to remove. How can I be sure I only remove the right >>> dependencies? Does QGIS have a list or something I can use as a guide? >>> >>> If anyone could explain how to use Synaptic package manager then I'd be >>> really grateful! It must have the most unintuitive interface of any piece >>> of software I've ever tried to use.. >>> >>> I edited the source file last time I installed it, so that part is done. >>> Incidentally, I don't see the 'other Software' tab in the Ubuntu Software >>> Center, so I just edited it manually. Any idea what that package is called? >>> I'm happy enough using the terminal if I know (roughly) what I'm doing! >>> >>> Thanks a lot team, >>> Jimi. >>> >>> On Wed, Feb 19, 2020 at 8:18 PM Andre Joost <andre+jo...@nurfuerspam.de> >>> wrote: >>> >>>> Am 18.02.20 um 23:58 schrieb J. M: >>>>> Hi again Andre, >>>>> >>>>> I don't actually understand what to do with this, because I can't run >>>> 'sudo >>>>> apt-get install qgis qgis-plugin-grass' as it keeps giving me the same >>>>> error messages about broken packages. >>>> >>>> Yes, because you have packages that are compiled against a set of >>>> libraries that does not match your computer. You have to remove, >>>> autoremove and purge those QGIS packages to force a download from the >>>> right folder. >>>> >>>> >>>>> When you say this, I don't get what this link does. I click on it and >>>> it >>>>> just takes me into a file hierarchy. Are users supposed to obtain the >>>>> downloads from here, or is it purely informative? >>>>> Try >>>>> deb https://qgis.org/ubuntugis bionic main >>>> >>>> That should go into your sources list, to replace the QGIS download >>>> source you used before. The Ubuntu Software center has a tab for "other >>>> Software" that holds the same information, so no need to edit the >>>> sources file manually. >>>> >>>> HTH, >>>> Andre Joost >>>> >>>> >>>> _______________________________________________ >>>> Qgis-user mailing list >>>> Qgis-user@lists.osgeo.org >>>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user >>>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user >>> >>> _______________________________________________ >>> Qgis-user mailing list >>> Qgis-user@lists.osgeo.org >>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user >>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user >> >> >> >> -- >> Ismail Sunni >> Software Engineer >> ismailsunni.id >> ismailsunni.wordpress.com >> > > > _______________________________________________ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user