Comment 15 for bug 1779237

Hello,
I got the same Python3 upgrade error.

Prior that, I had installed the very latest hplip-3.18.6 from a .run file.
I did also install the hplip-3.18.6-plugin.run file.

Reason for this is another bug in the hplip package.
Please see: https://bugs.launchpad.net/ubuntu/+source/hplip/+bug/1714659

The default hplip does not work in Ubuntu 18.04 with the GNOME-desktop
environment.
For example the "simple-scan" application did not start becuse of the
systray error in hplip.

I tried to alleviate this (systray + app exit) error by installing the
hplip from source.
It did not help, but I finally managed to disable the hplip`s use of
systray.

Ref:
https://sourceforge.net/projects/hplip/files/hplip/

http://www.openprinting.org/download/printdriver/auxfiles/HP/plugins/

Greetings
  osmo (moma) antero

Steve Langasek <email address hidden> escreveu no dia segunda,
16/07/2018 à(s) 22:00:

> > I remove the file HPLIP from usr/share/ (sudo rm -r /usr/share/hplip)
> > and re-install (sh hplip-3.18.6.run)
>
> /usr/share/hplip is a directory that is managed by the hplip-data
> package in Ubuntu. If you have installed an upstream version of hplip
> from source on top of the package, we cannot guarantee this will work;
> and this probably entirely explains the upgrade failure of python3.
>
> Why have you installed hplip from source on top of Ubuntu? Is there
> some howto on the Internet that suggests this is a reasonable thing to
> do?
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1779237
>
> Title:
> package python3 3.6.5-3ubuntu1 failed to install/upgrade: installed
> python3 package post-installation script subprocess returned error
> exit status 4
>
> Status in python3-defaults package in Ubuntu:
> Incomplete
>
> Bug description:
> Only Ubuntu Update
>
> ProblemType: Package
> DistroRelease: Ubuntu 18.04
> Package: python3 3.6.5-3ubuntu1
> ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17
> Uname: Linux 4.15.0-22-generic x86_64
> ApportVersion: 2.20.9-0ubuntu7.2
> Architecture: amd64
> Date: Thu Jun 28 22:51:28 2018
> ErrorMessage: installed python3 package post-installation script
> subprocess returned error exit status 4
> InstallationDate: Installed on 2018-04-13 (76 days ago)
> InstallationMedia: Ubuntu 16.04.4 LTS "Xenial Xerus" - Release amd64
> (20180228)
> Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal,
> 3.6.5-3ubuntu1
> PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal,
> 2.7.15~rc1-1
> RelatedPackageVersions:
> dpkg 1.19.0.5ubuntu2
> apt 1.6.2
> SourcePackage: python3-defaults
> Title: package python3 3.6.5-3ubuntu1 failed to install/upgrade:
> installed python3 package post-installation script subprocess returned
> error exit status 4
> UpgradeStatus: Upgraded to bionic on 2018-05-03 (56 days ago)
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/python3-defaults/+bug/1779237/+subscriptions
>

--
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