Comment 5 for bug 1891165

For me, as far I remember, to fix the issue on my local machine, I have to
remove python and reinstalled it.It seems that after upgrading ubuntu18 to
ubuntu focal, some python 2 footprints still remains, I am not sure if it
was the cause of issue but after removing python and purging both python2
and the newly installed python 3, and reinstalled python3, It works.

On Thu, 1 Oct 2020 at 00:25, Foobar <email address hidden> wrote:

> To be clear, I have since successfully upgraded but done so by:
>
> 0. (running apt-get update, dist-upgrade, etc to prepare)
> 1. deinstalling (via apt-get) gdm3
> 2. booting into recovery mode & initiating networking
> 3. running do-release-upgrade
> 4. restarting the system.
>
> I don't think I can exactly 'recommend' this way of doing it, but for me
> it was successful.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1891165
>
> Title:
> gsettings-desktop-schemas : Breaks: mutter (< 3.31.4) but
> 3.28.4-0ubuntu18.04.2 is to be installed
>
> Status in gsettings-desktop-schemas package in Ubuntu:
> Confirmed
>
> Bug description:
> I was about to upgrade ubuntu 18 to ubuntu 20, but it says “Your python3
> install is corrupted. Please fix the '/usr/bin/python3'”, So i tried to run
> sudo ln -sf /usr/bin/python2.7 /usr/bin/python as suggested in
> https://askubuntu.com/questions/1185813/how-to-fix-ubuntu-19-04-cannot-upgrade-to-19-10-error-your-python3-install-is.
> But i got more errors
>
>
> The following packages have unmet dependencies:
> gsettings-desktop-schemas : Breaks: mutter (< 3.31.4) but
> 3.28.4-0ubuntu18.04.2 is to be installed
> libgirepository-1.0-1 : Breaks: python-gi (< 3.34.0-4~) but
> 3.26.1-2ubuntu1 is to be installed
> E: Error, pkgProblemResolver::Resolve generated breaks, this may be
> caused by held packages.
>
> sudo ln -sf /usr/bin/python2.7 /usr/bin/python
>
> ProblemType: Bug
> DistroRelease: Ubuntu 20.04
> Package: mutter 3.28.4-0ubuntu18.04.2
> ProcVersionSignature: Ubuntu 5.4.0-42.46~18.04.1-generic 5.4.44
> Uname: Linux 5.4.0-42-generic x86_64
> ApportVersion: 2.20.9-0ubuntu7.16
> Architecture: amd64
> CurrentDesktop: ubuntu:GNOME
> Date: Tue Aug 11 20:38:08 2020
> InstallationDate: Installed on 2020-02-08 (184 days ago)
> InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64
> (20190805)
> SourcePackage: mutter
> UpgradeStatus: No upgrade log present (probably fresh install)
>
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