[Bug 1878587] Re: pk-client-error-quarl could not get lock when selecting driver from synaptic

[Sebastien Bacher]

Thank you for your bug report, indeed that's synaptic taking the lock
and including the option so the problem needs to be resolved from there

** Package changed: software-properties (Ubuntu) => synaptic (Ubuntu)

** Changed in: synaptic (Ubuntu)
   Importance: Undecided => Low

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https://bugs.launchpad.net/bugs/1878587

Title:
  pk-client-error-quarl could not get lock when selecting driver from
  synaptic

Status in synaptic package in Ubuntu:
  New

Bug description:
  Steps to reproduce (Ubuntu 20.04, synaptic 0.84.6ubuntu5,  software-properties-gtk 0.98.9)
  1. Open synaptic
  2. click in "parameters" menu, then "repositories". This will open a "Software and update" window
  3. click on "additional drivers" tab
  4. select a new driver (example : I have nvidia 435 installed, I select nvidia 440)
  5. click apply

  Expected behaviour : the selected driver is installed

  Actual behaviour: you get an error window with message: 
  "pk-client-error-quark: E: could not get lock /var/lib/dpkg/lock-front-end.
  It is held by process 9246 (synaptic)"

  Workaround: launch "software update" directly without synaptic

  I understand that synaptic must be closed in order to let another
  software updating process operate. But this software update has been
  initiated from synaptic and I cannot close synaptic when software
  update is opened. It is opened like a modal window...

  Ithink either this feature should be removed from synaptic or avtrick
  must be found to have it releasing the lock as long as the "software
  update" window it has triggered is opened; or maybe synaptic and
  software-update-gtk could share the lock in this situation ? For now
  it is impossible to install additional driver if you launched it from
  synaptic.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: software-properties-gtk 0.98.9
  ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30
  Uname: Linux 5.4.0-29-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu27
  Architecture: amd64
  CasperMD5CheckResult: skip
  Date: Thu May 14 11:34:44 2020
  ExecutablePath: /usr/bin/software-properties-gtk
  InstallationDate: Installed on 2020-05-12 (1 days ago)
  InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
  InterpreterPath: /usr/bin/python3.8
  PackageArchitecture: all
  ProcEnviron:
   SHELL=/bin/bash
   LANG=fr_FR.UTF-8
   PATH=(custom, no user)
  Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu2
  PythonDetails: N/A
  SourcePackage: software-properties
  UpgradeStatus: Upgraded to focal on 2020-05-12 (1 days ago)

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