[Bug 1763844] Re: package python3-apt 1.6.0~rc2ubuntu2 failed to install/upgrade: subprocess new pre-removal script returned error exit status 127

[Chris Coleman]

I fixed the display problem by running the following command, which
appeared to work OK:

sudo apt-get install --reinstall python-apt

After that I opened "Settings" and on the "Screen Display" tab I then
had the choice of choosing the proper video card driver. I chose it, and
restarted, and I now have a sensible display setting of 1680*1050.

As a point of interest, when the display was set to 640*480 it was
extremely difficult to use things like "Settings" due to the inability
to scroll down on the wizard or the screen. Perhaps some testing of such
things against what I presume is the default screen setting of 640*480
would make trouble shooting easier.

Thanks,
Chris

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https://bugs.launchpad.net/bugs/1763844

Title:
  package python3-apt 1.6.0~rc2ubuntu2 failed to install/upgrade:
  subprocess new pre-removal script returned error exit status 127

Status in python-apt package in Ubuntu:
  Incomplete

Bug description:
  Problem occurred setting the displays arrangement

  ProblemType: Package
  DistroRelease: Ubuntu 18.04
  Package: python3-apt 1.6.0~rc2ubuntu2
  ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10
  Uname: Linux 4.15.0-13-generic x86_64
  ApportVersion: 2.20.9-0ubuntu4
  Architecture: amd64
  Date: Fri Apr 13 17:34:14 2018
  ErrorMessage: subprocess new pre-removal script returned error exit status 127
  InstallationDate: Installed on 2017-04-13 (364 days ago)
  InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
  Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-2
  PythonDetails: /usr/bin/python2.7, Python 2.7.14+, python-minimal, 2.7.14-4
  RelatedPackageVersions:
   dpkg 1.19.0.5ubuntu1
   apt  1.6~beta1
  SourcePackage: python-apt
  Title: package python3-apt 1.6.0~rc2ubuntu2 failed to install/upgrade: subprocess new pre-removal script returned error exit status 127
  UpgradeStatus: Upgraded to bionic on 2018-04-13 (0 days ago)

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