Hi! It looks like your machine is trying to install 3.12.
As I mentioned in the last part of my previous message, right now you can't install QGIS 3.12 on Ubuntu 18.04 because 3.12 needs PROJ 6.3.1 which currently isn't available in Bionic -- via the main canonical repo or even with the ubuntugis-unstable PPA. Therefore, I suggest installing from the LTR branch and not the LR branch. When I use the LTR branch with ubuntugis dependencies, I get QGIS 3 10.2 no problem. I run the same machine as you and actually faced the same problem when I tried to install the Latest Release (3.12) on Bionic. Try using the repos for the LTR (the ones with -ltr in the end). Maybe that will help. Don't worry about it, we've all been there. All the best, Ben Hur On Wed, Feb 26, 2020, 07:12 J. M <jimimc...@gmail.com> wrote: > Hi Ben, > > No joy, I'm afraid. I think I did everything you recommended. I'm going to > run through it in case I missed something obvious: > > - I ran sudo apt remove qgis grass qgis-plugin-grass, then ran sudo > apt-get update > - The /etc/apt/sources file contains the correct info because I > modified it for the last installation > - I ran autoremove on QGIS and erased over a gigabyte of > dependencies (which seemed like a *lot*..) > - I ran sudo apt-key list to check if the ubuntugis-unstable PPA was > still listed as trusted, and it didn't appear > - I added the ubuntugis stable PPA as recommended on > https://trac.osgeo.org/ubuntugis/wiki/UbuntuGISRepository, with sudo > add-apt-repository ppa:ubuntugis/ppa, and it appeared to duplicate > your command sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-key > 51F523511C7028C3. Is that possible when they appear to reference two > different PPA's? > - I ran sudo apt-get install qgis qgis-plugin-grass and received the > following error message, similar to before: > > The following packages have unmet dependencies. > qgis : Depends: gdal-abi-2-2-3 > Depends: libqgis-analysis3.12.0 but it is not going to be installed > Depends: libqgis-app3.12.0 but it is not going to be installed > Depends: libqgis-core3.12.0 but it is not going to be installed > Depends: libqgis-gui3.12.0 but it is not going to be installed > Depends: python3-qgis (= 1:3.12.0+28bionic) but it is not going to > be installed > Depends: qgis-providers (= 1:3.12.0+28bionic) but it is not going > to be installed > qgis-plugin-grass : Depends: qgis-provider-grass (= 1:3.12.0+28bionic) > but it is not going to be installed > Depends: grass740 > Depends: libqgis-app3.12.0 but it is not going to be > installed > Depends: libqgis-core3.12.0 but it is not going to be > installed > Depends: libqgis-gui3.12.0 but it is not going to be > installed > Depends: libqgisgrass7-3.12.0 but it is not going to > be installed > E: Unable to correct problems, you have held broken packages. > > I must be missing something. Do I have to open the UI via terminal (sudo > nautilus) and manually remove every file which makes reference to QGIS and > ubuntugis-unstable? As formatting my machine isn't an option there must be > a simple way of completely removing the program and its dependencies.. > right?! > > I don't even know what Gdal is or does, because I can't even get started > learning QGIS because I'm finding it impossible to have a version running > for long enough to start with tutorials! Is it to allow you to overlay > raster info onto GIS projects or something? I googled it but the > explanation must have been written by a robot (no offence intended, to > robots I mean). Gdal was the reason I installed the ubuntugis-unstable PPA, > because Blender gave me the helpful error message: Please install gdal to > enable raster projection support. As my crystal ball was clouded up when > I read that I came here to bug you guys for help! > > > Thanks again to everyone who has had a go at helping me. Keep those ideas > coming!! > Cheers, > Jimi. > > On Tue, Feb 25, 2020 at 11:39 PM J. M <jimimc...@gmail.com> wrote: > >> Hi Ben! >> >> Thanks a lot for that, really helpful; I'll give it a go. It was actually >> the ubuntugis unstable PPA which caused the current problem I'm having, so >> I'm keen to avoid that PPA if I can. I'll try your steps again and let you >> know what the outcome is. >> >> Cheers, >> Jimi. >> >> On Tue, Feb 25, 2020 at 4:44 AM Ben Hur Pintor <bnhr....@gmail.com> >> wrote: >> >>> Hi! >>> >>> First of all, make sure that you add the qgis.org repo public key >>> via sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-key >>> 51F523511C7028C3. Make sure that the library versions in your computer >>> (specially GDAL and PROJ) are the same libraries that QGIS is built against. >>> >>> The links in >>> https://www.qgis.org/en/site/forusers/alldownloads.html#debian-ubuntu >>> determine >>> which versions of QGIS will be installed. You add these as sources in the >>> Software Center or you can add them directly in your /etc/apt/sources.list >>> file as instructed in >>> https://qgis.org/en/site/forusers/alldownloads.html#debian-ubuntu. >>> If you want 3.12 (Latest Release), you can use/add the following in your >>> /etc/apt/sources.list file https://qgis.org/ubuntu or >>> https://qgis.org/ubuntugis (if with ubuntugis-unstable dependencies). >>> If you want the LTR branch (3.10.3), simply use >>> https://qgis.org/ubuntu-ltr or https://qgis.org/ubuntugis-ltr (if with >>> ubuntugis-unstable dependencies) in your /etc/apt/sources.list file. >>> >>> Also, don't forget to remove/purge all previous QGIS or GRASS >>> installations (e.g. sudo apt remove qgis grass qgis-plugin-grass) and do an >>> update (sudo apt update) before trying to install QGIS again. >>> >>> I run Pop! OS 18.04 (based on Ubuntu 18.04). Unfortunately, the >>> libraries in the main (universe) repo of Bionic are a bit outdated (GDAL >>> 2.2.3, PROJ 4.9, etc.). The newer versions of QGIS use GDAL 3.0.X and PROJ >>> 6.X. Using the ubuntugis-unstable ( >>> https://launchpad.net/~ubuntugis/+archive/ubuntu/ubuntugis-unstable) >>> PPA remedies the problem of some outdated libraries. If you will use the >>> ubuntugis-unstable libraries, don't forget to add the PPA to your sources >>> as well. On another note, PROJ 6.3.1, which QGIS 3.10.3 and 3.12 use, isn't >>> available yet in Bionic even when using the ubuntugis PPA so even if I >>> want, I can only install 3.10.2 right now on my machine. Trying to install >>> 3.12 via the ubuntu or ubuntugis repo fails. >>> >>> >>> All the best, >>> Ben Hur >>> >>> On Tue, Feb 25, 2020, 07:25 J. M <jimimc...@gmail.com> wrote: >>> >>>> Hi Ismail, >>>> >>>> Well, I've tried everything I can think of, everything people have >>>> recommended and everything I've googled, but there seems to be no earthly >>>> way to get rid of the following error messages: >>>> >>>> sudo apt-get install qgis qgis-plugin-grass >>>> Reading package lists... Done >>>> Building dependency tree >>>> Reading state information... Done >>>> Some packages could not be installed. This may mean that you have >>>> requested an impossible situation or if you are using the unstable >>>> distribution that some required packages have not yet been created >>>> or been moved out of Incoming. >>>> The following information may help to resolve the situation: >>>> >>>> The following packages have unmet dependencies. >>>> qgis : Depends: python3-qgis (= 1:3.12.0+28bionic) but it is not going >>>> to be installed >>>> E: Unable to correct problems, you have held broken packages. >>>> >>>> I've tried this: >>>> >>>> sudo apt-get purge qgis >>>> sudo apt-get autoremove qgis >>>> sudo apt-get --purge remove qgis >>>> sudo apt-get update >>>> >>>> but it returned the following: >>>> >>>> sudo apt-get update >>>> >>>> >>>> Hit:6 http://qgis.org/debian bionic InRelease >>>> >>>> The following signatures couldn't be verified because the public key >>>> is not available: NO_PUBKEY 76F1A20FF987672F >>>> Hit:18 http://ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu >>>> bionic InRelease >>>> Err:18 http://ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu >>>> bionic InRelease >>>> The following signatures couldn't be verified because the public key >>>> is not available: NO_PUBKEY 089EBE08314DF160 >>>> Reading package lists... Done >>>> W: GPG error: https://dl.winehq.org/wine-builds/ubuntu bionic >>>> InRelease: The following signatures couldn't be verified because the public >>>> key is not available: NO_PUBKEY 76F1A20FF987672F >>>> E: The repository 'https://dl.winehq.org/wine-builds/ubuntu bionic >>>> InRelease' is not signed. >>>> N: Updating from such a repository can't be done securely, and is >>>> therefore disabled by default. >>>> N: See apt-secure(8) manpage for repository creation and user >>>> configuration details. >>>> W: An error occurred during the signature verification. The repository >>>> is not updated and the previous index files will be used. GPG error: >>>> http://ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu bionic >>>> InRelease: The following signatures couldn't be verified because the public >>>> key is not available: NO_PUBKEY 089EBE08314DF160 >>>> >>>> >>>> I can't think of anything else. Any suggestions about what I might be >>>> doing wrong? I don't actually understand what this link is for: >>>> https://www.qgis.org/en/site/forusers/alldownloads.html#debian-ubuntu >>>> If you download via the terminal by typing 'sudo apt-get install qgis' >>>> then how do you make use of all the folders in this link? I mean, how do I >>>> differentiate if I want to download version 3.10 or 3.12 of QGIS? >>>> >>>> Sorry team, I just can't get this to work and I'm worried I do >>>> irreparable damage to my system with this process. >>>> Please help me out, guys! >>>> Cheers, >>>> Jimi. >>>> >>>> >>>> >>>> On Mon, Feb 24, 2020 at 6:58 PM J. M <jimimc...@gmail.com> 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 >>> >>>
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