[Bug 2059796] Re: Other Software > Remove button doesn't work

[Nathan Teodosio]

After racking my brains thinking this had to do with deb822, I found
that a Dbus exception was being suppressed by only logging one
particular exception. Disabling the catch with

--->
    def on_remove_clicked(self, widget):
        """Remove the selected source"""
        model = self.treeview_sources.get_model()
        (path, column) = self.treeview_sources.get_cursor()
        iter = model.get_iter(path)
        if iter:
            source_entry = model.get_value(iter, LIST_ENTRY_OBJ)
            #try:
            self.backend.RemoveSource(str(source_entry))
            #except dbus.DBusException as e:
            #    maybe_log_authentication_canceled_error(e)
<---

reveals the issue:

--->
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 1159, in on_remove_clicked
    self.backend.RemoveSource(str(source_entry))
  File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 141, in __call__
    return self._connection.call_blocking(self._named_service,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/dbus/connection.py", line 634, in call_blocking
    reply_message = self.send_message_with_reply_and_block(
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
dbus.exceptions.DBusException: com.ubuntu.SoftwareProperties.PermissionDeniedByPolicy: com.ubuntu.softwareproperties.applychanges
<---

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https://bugs.launchpad.net/bugs/2059796

Title:
  Other Software > Remove button doesn't work

Status in software-properties package in Ubuntu:
  Triaged

Bug description:
  Test Case
  ---------
  - Add a PPA
  - Open the Software & Updates tab
  - Switch to the Other Software tab
  - Select the PPA line and click Remove
  - After Authentication, nothing happens.

  No error is emitted to the command line. The repo line still shows.
  The repo is still in /etc/apt/sources.list.d/

  ProblemType: Bug
  DistroRelease: Ubuntu 24.04
  Package: software-properties-gtk 0.99.44
  ProcVersionSignature: Ubuntu 6.8.0-20.20-generic 6.8.1
  Uname: Linux 6.8.0-20-generic x86_64
  NonfreeKernelModules: zfs
  ApportVersion: 2.28.0-0ubuntu1
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Mar 29 12:06:07 2024
  InstallationDate: Installed on 2022-04-06 (723 days ago)
  InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Daily amd64 (20220405)
  PackageArchitecture: all
  ProcEnviron:
   LANG=en_US.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/bash
   TERM=xterm-256color
   XDG_RUNTIME_DIR=<set>
  SourcePackage: software-properties
  UpgradeStatus: Upgraded to noble on 2023-12-09 (111 days ago)

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