[Qgis-user] QGIS uninstalled after GDAL PPA install

Mon Feb 24 19:43:24 PST 2020

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in the main (universe) repo of Bionic are a bit outdated (GDAL 2.2.3, PROJ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remedies the problem of some outdated libraries.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 <jimimckay at 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 <jimimckay at 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 <imajimatika at 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 <jimimckay at 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+joost at 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 at 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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>>>
>>>
>>>
>>> --
>>> Ismail Sunni
>>> Software Engineer
>>> ismailsunni.id
>>> ismailsunni.wordpress.com
>>>
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