[Bug 1990196] Re: oem-config-kde crashes when buttons clicked

[Michael Mikowski]

Oliver, per #15 I'd like to get this in place for 22.04 LTS production
systems. If it's simple enough, can you point us on how to disable the
Next and Back buttons on the last slide so we could at least patch it?
We have done some work, but a bit of experienced direction would
certainly be welcome, and we would of course report back here how well
things may have worked.

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https://bugs.launchpad.net/bugs/1990196

Title:
  oem-config-kde crashes when buttons clicked

Status in ubiquity package in Ubuntu:
  In Progress
Status in ubiquity source package in Jammy:
  Confirmed
Status in ubiquity source package in Kinetic:
  Confirmed
Status in ubiquity source package in Lunar:
  In Progress

Bug description:
  During oem-config-kde mode, after user information has been entered,
  oem-config-kde keeps the "Back" and "Continue" buttons when these
  shouldn't appear at this stage. If these are clicked, the installer
  will crash, this is 100% reproducible:

  Traceback (most recent call last):
   File" /usr/lib/ubiquity/ubiquity/frontend/kde_ui.py", line 1073, in on_next_clicked
    ui = self.pages[self.pagesindex].ui
  IndexError:list index out of range

  This is very bad from a user experience point of view as this can make
  the system unrecoverable without a complete reinstall, depending on
  where in the process the installer was when the user clicked on either
  of these buttons.

  This problem exists in both Jammy and Kinetic. See attached
  screenshots and pictures.

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