[Qgis-user] QGIS uninstalled after GDAL PPA install

Mon Feb 24 15:25:08 PST 2020

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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