[Bug 1767799] Re: ubiquity crashed with reuse home and existing encrypted home - 'PageGtk' object has no attribute 'error_dialog'

[Kjetil Rydland]

I had this issue and I also managed to solve it with (I think) pure luck.
I had an old LTS installed, and wanted to upgrade to 18.04. I decided to do a clean install with a live-USB. I got this error but tried anyway. The installation never finished and my system was broken. I recently tried again, but this time I chose to NOT format / and I also didn't specify to use my old /home as /home. The installation then went flawlessly and I had a working 18.04.3 installation.

However, I managed to install with a new username, not the one I had
been using. This meant I had no access to my old user files. I then
reinstalled again with the correct username, and again the install went
flawlessly. But I could not log in, I just got sent back to the login
prompt. I then installed ecryptfs-utils via tty, and log in now works
and my system is fine.

I'm not sure if this is helpful or related to this bug, but hopefully it
is.

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https://bugs.launchpad.net/bugs/1767799

Title:
  ubiquity crashed with reuse home and existing encrypted home -
  'PageGtk' object has no attribute 'error_dialog'

Status in ubiquity package in Ubuntu:
  Confirmed

Bug description:
  ubiquity crased - Impossible to install ubuntu 18.04.
  /var/log/installer/debug :

  Gtk-Message: 11:32:11.409: GtkDialog mapped without a transient parent. This is discouraged.
  Le schéma « com.canonical.indicator.session » n’existe pas
  Le schéma « com.canonical.indicator.session » n’existe pas
  Le schéma « com.canonical.indicator.session » n’existe pas
  Le schéma « com.canonical.indicator.session » n’existe pas
  /usr/lib/ubiquity/plugins/ubi-timezone.py:98: PyGIWarning: Soup was imported without specifying a version first. Use gi.require_version('Soup', '2.4') before import to ensure that the right version gets loaded.
    from gi.repository import Gtk, GObject, GLib, Soup
  Ecryptfs is deprecated
  Ecryptfs is deprecated
  Exception caught in process_line:
  Traceback (most recent call last):
    File "/usr/lib/ubiquity/ubiquity/filteredcommand.py", line 145, in process_line
      return self.dbfilter.process_line()
    File "/usr/lib/ubiquity/ubiquity/debconffilter.py", line 302, in process_line
      if not widget.error(priority, question):
    File "/usr/lib/ubiquity/plugins/ubi-usersetup.py", line 816, in error
      self.ui.error_dialog(
  AttributeError: 'PageGtk' object has no attribute 'error_dialog'

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