[Qgis-user] QGIS uninstalled after GDAL PPA install

[Alex Mandel]

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 <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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>>
>>
>> --
>> Ismail Sunni
>> Software Engineer
>> ismailsunni.id
>> ismailsunni.wordpress.com
>>
> 
> 
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