[Bug 2086773] Re: pkcon does not ask debconf questions in Wayland

[Andreas Hasenack]

https://ubuntu-archive-team.ubuntu.com/proposed-
migration/noble/update_excuses.html#packagekit says that packagekit
depends on apt for the noble update, but I think this does not apply
here and I see no packagekit failures under that apt package.

In any case, I quickly tested installing the updated packagekit packages
from noble-proposed on a noble system without also updating apt from
proposed, and there were no obvious problems. And the test plan was also
executed in the comment above.

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https://bugs.launchpad.net/bugs/2086773

Title:
  pkcon does not ask debconf questions in Wayland

Status in packagekit package in Ubuntu:
  Fix Released
Status in packagekit source package in Jammy:
  Fix Released
Status in packagekit source package in Noble:
  Fix Released
Status in packagekit source package in Oracular:
  Fix Released

Bug description:
  [ Impact ]

  `pkcon` is configured to launch the Gtk debconf helper to ask debconf questions graphically.
  This works in Xorg desktop sessions, but does not work in Wayland desktop sessions.

  That is because it starts the Gtk program with a blank environment and
  only adds the DISPLAY environment variable, but not WAYLAND_DISPLAY
  nor XAUTHORITY which would at least have allowed it to display over
  XWayland.

  This is fixed by exposing the WAYLAND_DISPLAY and/or XAUTHORITY
  environment variables to the Gtk program.

  [ Test Case ]

  1. Log-in to a Wayland desktop session
  2. Download `noisy-fake-driver_0.6_amd64.deb` from the attachments.
  3. Run `pkcon install-local ~/Downloads/noisy-fake-driver_0.6_amd64.deb`
  4. Complete the installation
  5. Verify that you saw the "Do you see this message?" question

  [ Where problems could occur ]

  It's fair to assume that the graphical debconf helper hasn't received
  much testing recently, with `apt` defaulting to the text-base helper
  and `pkcon` failing to show it in Wayland; so it's possible that it
  doesn't work well.

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