[Bug 1879178] Re: :Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.

[Ubuntu Foundations Team Bug Bot]

** Package changed: ubuntu => update-manager (Ubuntu)

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https://bugs.launchpad.net/bugs/1879178

Title:
  :Error, pkgProblemResolver::Resolve generated breaks, this may be
  caused by held packages.

Status in update-manager package in Ubuntu:
  New

Bug description:
  This started after I tried to select a different nvidia driver. I am unable to go back to my original selection and the error persists whenever I run the update-manager. I am running 
  Mate
  Description:	Ubuntu 18.04.4 LTS
  Release:	18.04
  I don't know the name of the package that is causing the problem
  I was expecting to update my nvidia driver and get my external monitor working, or when it didn't update for things to go back to normal. (Nothing but good things)
  The update manager shows that I have gone back to the default nvidia driver, and produces the ":Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages." message when I run the update manager. 
  I have included a screen shot of the drivers I was selecting from. I started on the first driver NVIDIA driver metapackage. I tried to switch to the third driver NVIDIA binary driver version 340.108. This appeared to fail and is when the message that is the subject of this report started, the selection also went to what it is now X.Org X.Server. After that I the second entry the legacy driver, and returning to the NVIDIA driver metapackage. None of these subsequent attempts changed anything that I could see.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: update-manager 1:18.04.11.12
  ProcVersionSignature: Ubuntu 4.15.0-99.100-generic 4.15.18
  Uname: Linux 4.15.0-99-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.14
  Architecture: amd64
  CurrentDesktop: MATE
  Date: Sun May 17 13:38:45 2020
  GsettingsChanges:
   b'com.ubuntu.update-manager' b'first-run' b'false'
   b'com.ubuntu.update-manager' b'window-width' b'713'
   b'com.ubuntu.update-manager' b'launch-time' b'int64 1589736717'
   b'com.ubuntu.update-manager' b'launch-count' b'433'
  InstallationDate: Installed on 2018-09-01 (623 days ago)
  InstallationMedia: Ubuntu-MATE 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en_US
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: update-manager
  UpgradeStatus: No upgrade log present (probably fresh install)

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