"software & updates" freezes after selecting "canonical partners¨

[Christians]

On a fresh install of 19.04, in "Software & Updates" when I select "Canonical Partners" the window "Authentication Required" pops up. After typing the password the mouse freezes, and can be unfrozen with CTRL+ALT+DEL. But the "Canonical Partners" cannot be selected, check box stays empty, mouse freezes again. Even after cold restart.

WORKAROUND
Select "Canonical Partners Sources" instead. After authorizing I can now also select "Canonical Partners". This was impossible before.

After this I can select and deselect Canonical Partner in "Software & Updates".
The previous authorization window, which opened first, and when the mouse froze, stays open and cannot be closed with CANCEL or ALT+F4.

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: software-properties-gtk 0.97.11
ProcVersionSignature: Ubuntu 5.0.0-13.14-generic 5.0.6
Uname: Linux 5.0.0-13-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.10-0ubuntu27
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Apr 20 00:17:33 2019
ExecutablePath: /usr/bin/software-properties-gtk
InstallationDate: Installed on 2019-04-19 (0 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
InterpreterPath: /usr/bin/python3.7
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
Python3Details: /usr/bin/python3.7, Python 3.7.3, python3-minimal, 3.7.3-1
PythonDetails: N/A
SourcePackage: software-properties
UpgradeStatus: No upgrade log present (probably fresh install)

[Sebastien Bacher (seb128)]

Thank you for your bug report. Could you add your journalctl log after getting the issue?

[Christians (script-vollbio)]

Here is the tail of /var/log/syslog when I try and fail to select Canonical Partners"

Apr 23 21:52:20 mycomputer gnome-shell[1932]: pushModal: invocation of begin_modal failed
Apr 23 21:52:20 mycomputer gnome-shell[1932]: polkitAuthenticationAgent: Failed to show modal dialog. Dismissing authentication request for action-id com.ubuntu.softwareproperties.applychanges cookie 2-23574a46bd8318158fe3dd4ecc52a32a-5-c93d2ab7373f92c6fc2f3db033d3eb15
Apr 23 21:52:20 mycomputer software-properties-gtk.desktop[1932]: ERROR:root:Authentication canceled, changes have not been saved
Apr 23 21:52:27 mycomputer systemd[1675]: tracker-extract.service: Succeeded.

Apr 23 21:52:44 mycomputer gnome-shell[1932]: pushModal: invocation of begin_modal failed
Apr 23 21:52:44 mycomputer gnome-shell[1932]: polkitAuthenticationAgent: Failed to show modal dialog. Dismissing authentication request for action-id com.ubuntu.softwareproperties.applychanges cookie 2-23574a46bd8318158fe3dd4ecc52a32a-6-665483d7b8251faa59df638e0cb38a3f
Apr 23 21:52:44 mycomputer software-properties-gtk.desktop[1932]: ERROR:root:Authentication canceled, changes have not been saved
Apr 23 21:52:55 mycomputer gnome-shell[1932]: pushModal: invocation of begin_modal failed
Apr 23 21:52:55 mycomputer gnome-shell[1932]: polkitAuthenticationAgent: Failed to show modal dialog. Dismissing authentication request for action-id com.ubuntu.softwareproperties.applychanges cookie 2-23574a46bd8318158fe3dd4ecc52a32a-7-447f164721374873942ad295e4688bff
Apr 23 21:52:55 mycomputer software-properties-gtk.desktop[1932]: ERROR:root:Authentication canceled, changes have not been saved

[Sebastien Bacher (seb128)]

looks like bug #1734095 then (though the other one describe the auth failing but no locking)

[Daniel van Vugt (vanvugt)]

Thank you for reporting this bug to Ubuntu.
Ubuntu 19.04 (disco) reached end-of-life on January 23, 2020.

See this document for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases

We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. If you then find the bug is still present in the newer Ubuntu version, please add a comment here telling us which new version it is in and change the bug status to Confirmed.