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

[Olivier Gayot]

Please ignore my last comment. After investigating more, I figured that
in a normal install, the Back and Next buttons are completely hidden on
the final screen.

The function responsible for hiding the Back & Next buttons (aka. the
navigation buttons) is the function start_slideshow.

However, this function only hides the navigation if a slideshow exists -
which is not true when running oem-config. When no slideshow exists, it
simply shows an empty page but does not hide the navigation.

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

Title:
  oem-config-kde crashes when buttons clicked

Status in ubiquity package in Ubuntu:
  Confirmed
Status in ubiquity source package in Jammy:
  Confirmed
Status in ubiquity source package in Kinetic:
  Confirmed

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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