[Bug 1943614] Re: ubuntu-drivers crashes due to click when ubiquity runs the Polish language (locale)

[Łukasz Zemczak]

** Also affects: ubiquity (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** Changed in: ubiquity (Ubuntu Bionic)
   Importance: Undecided => Critical

** Changed in: ubiquity (Ubuntu)
       Status: New => Invalid

** Changed in: ubiquity (Ubuntu Bionic)
       Status: New => Confirmed

** Changed in: ubiquity (Ubuntu Bionic)
     Assignee: (unassigned) => Łukasz Zemczak (sil2100)

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Title:
  ubuntu-drivers crashes due to click when ubiquity runs the Polish
  language (locale)

Status in ubiquity package in Ubuntu:
  Invalid
Status in ubiquity source package in Bionic:
  Confirmed

Bug description:
  [Impact]

  Ok, first of all - I am unsure if this is a regression or not, since I did not test extra drivers with old images. I'm testing this on kvm now.
  So far this bug appeared for me when I was running ubiquity with secureboot enabled on a NVidia GPU machine.

  Basically when installing Ubuntu desktop on a system that uses ubuntu-
  drivers but using a non-standard locale (like in my case, the Polish
  language from the language selector), ubuntu-drivers will crash with:

  `
  Traceback (most recent call last):
    File "/usr/bin/ubuntu-drivers", line 480, in <module>
      greet()
    File "/usr/lib/python3/dist-packages/click/core.py", line 722, in __call__
      return self.main(*args, **kwargs)
    File "/usr/lib/python3/dist-packages/click/core.py", line 676, in main
      _verify_python3_env()
    File "/usr/lib/python3/dist-packages/click/_unicodefun.py", line 118, in _verify_python3_env
      'for mitigation steps.' + extra)
  RuntimeError: Click will abort further execution because Python 3 was configured to use ASCII as encoding for the environment.  Consult http://click.pocoo.org/python3/for mitigation steps.

  This system supports the C.UTF-8 locale which is recommended.
  You might be able to resolve your issue by exporting the
  following environment variables:

      export LC_ALL=C.UTF-8
      export LANG=C.UTF-8

  Click discovered that you exported a UTF-8 locale
  but the locale system could not pick up from it because
  it does not exist.  The exported locale is "pl_PL.UTF-8" but it
  is not supported
  ubuntu-drivers autoinstall failed with code: 1
  `

  [Test Case]

  * Download latest 18.04.6 candidate image for ubuntu-desktop
  * In language selector, select Polish (Polski)
  * Proceed with the installation and checking "Install third-party software..."
  * Boot into the installed system
  * Check if `ubuntu-drivers install ...` succeeded during installation, checking the installer syslog.

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