[Bug 2122357] Re: [SRU] Dialog not opening after selecting "Other" for Ubuntu Software source

[Robie Basak]

Erich, that's useful as a check before uploading, but for SRU purposes
we'd like the full user story tested with the final built binary please,
and I'm additionally requesting that for Questing because it hasn't had
any time to "bake" such that lack of natural bug reports can give us
confidence in the full user story.

Therefore, please could you follow the full Test Plan for both Questing
and Plucky, having enhanced it as I requested?

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Title:
  [SRU] Dialog not opening after selecting "Other" for Ubuntu Software
  source

Status in software-properties package in Ubuntu:
  Fix Released
Status in software-properties source package in Plucky:
  Fix Committed
Status in software-properties source package in Questing:
  Fix Released

Bug description:
  [Impact]

  Users are unable to select alternative mirrors under Software Sources
  for Kubuntu, Lubuntu, and Ubuntu Studio which use software-properties-
  qt. As it turns out, this is because DialogMirror.py was never ported
  to Qt6.

  [Test Plan]

  Steps to reproduce.

  1) Go to "Software Sources"
  2) Go to "Ubuntu Software" tab
  3) On the "Download from:" field select the option "Other..." in the dropdown.

  Expected result: A dialog opens which allows selecting a mirror.
  Actual result: "Software Sources" tab freezes for ~1 second and the dialog is not opened.

  [What problems could occur]

  There may be more issues that could occur, such as other fields being
  incomplete, but this has been well-tested.

  [Original Report Information]

  ProblemType: Bug
  DistroRelease: Ubuntu 25.04
  Package: software-properties-qt 0.111
  Uname: Linux 6.16.3-061603-generic x86_64
  ApportVersion: 2.32.0-0ubuntu5.3
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: KDE
  Date: Mon Sep  8 20:53:22 2025
  InstallationDate: Installed on 2025-08-07 (32 days ago)
  InstallationMedia: Kubuntu 25.04 "Plucky Puffin" - Release amd64 (20250417)
  PackageArchitecture: all
  SourcePackage: software-properties
  UpgradeStatus: No upgrade log present (probably fresh install)

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