[Qgis-user] QGIS uninstalled after GDAL PPA install

[J. M]

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 in the main (universe) repo of Bionic are a bit outdated (GDAL 2.2.3, PROJ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 remedies the problem of some outdated libraries.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