software-properties-gtk fails to launch via "Additional Drivers" or via terminal

[Sebastian Straszak]

Issue present since reinstall of Ubuntu. Originally thought similar to (https://askubuntu.com/questions/789966/software-updates-crashes-and-will-not-open) but solutions did not work, even though terminal output (https://pastebin.com/FpD1MFC3) is highly similar.

I have tested using a new user and the issue remains.

1)
Description: Ubuntu 19.10
Release: 19.10
Linux version 5.3.0-26-generic (buildd@lgw01-amd64-013) (gcc version 9.2.1 20191008 (Ubuntu 9.2.1-9ubuntu2))
2)
software-properties-gtk:
  Installed: 0.98.5
  Candidate: 0.98.5
  Version table:
 *** 0.98.5 500
        500 http://gb.archive.ubuntu.com/ubuntu eoan/main amd64 Packages
        500 http://gb.archive.ubuntu.com/ubuntu eoan/main i386 Packages
        100 /var/lib/dpkg/status
3)
Additional Drivers utility should launch when executing command "software-properties-gtk" with or without root.
4)
Long error fight between dbus and python3.

A note on attempted solutions. Reinstalling dbus/dbus-x11 and following the noted askubuntu thread did not help.

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: software-properties-gtk 0.98.5
ProcVersionSignature: Ubuntu 5.3.0-26.28-generic 5.3.13
Uname: Linux 5.3.0-26-generic x86_64
ApportVersion: 2.20.11-0ubuntu8.2
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Wed Jan 22 03:48:12 2020
InstallationDate: Installed on 2020-01-14 (8 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: software-properties
UpgradeStatus: No upgrade log present (probably fresh install)

[Sebastien Bacher (seb128)]

Thank you for your bug report. Could you include the output of the
$ software-properties-gtk command?
Could you also include the 'journalctl -b 0' log after getting the issue?

[Sebastian Straszak (callous4567)]

$ software-properties-gtk command?
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/dbus/bus.py", line 177, in activate_name_owner
    return self.get_name_owner(bus_name)
  File "/usr/lib/python3/dist-packages/dbus/bus.py", line 363, in get_name_owner
    's', (bus_name,), **keywords)
  File "/usr/lib/python3/dist-packages/dbus/connection.py", line 653, in call_blocking
    message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.NameHasNoOwner: Could not get owner of name 'com.ubuntu.SoftwareProperties': no such name

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/bin/software-properties-gtk", line 100, in <module>
    app = SoftwarePropertiesGtk(datadir=options.data_dir, options=options, file=file)
  File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 161, in __init__
    proxy = bus.get_object("com.ubuntu.SoftwareProperties", "/")
  File "/usr/lib/python3/dist-packages/dbus/bus.py", line 243, in get_object
    follow_name_owner_changes=follow_name_owner_changes)
  File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 250, in __init__
    self._named_service = conn.activate_name_owner(bus_name)
  File "/usr/lib/python3/dist-packages/dbus/bus.py", line 182, in activate_name_owner
    self.start_service_by_name(bus_name)
  File "/usr/lib/python3/dist-packages/dbus/bus.py", line 280, in start_service_by_name
    'su', (bus_name, flags)))
  File "/usr/lib/python3/dist-packages/dbus/connection.py", line 653, in call_blocking
    message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.Spawn.ExecFailed: Cannot launch daemon, file not found or permissions invalid

journalctl -b 0
-- Logs begin at Tue 2020-01-14 01:44:46 GMT, end at Fri 2020-01-24 08:01:38 GMT
Jan 24 06:56:48 callous-MS-7B45 kernel: microcode: microcode updated early to re
Jan 24 06:56:48 callous-MS-7B45 kernel: Linux version 5.3.0-26-generic (buildd@l
Jan 24 06:56:48 callous-MS-7B45 kernel: Command line: BOOT_IMAGE=/boot/vmlinuz-5
Jan 24 06:56:48 callous-MS-7B45 kernel: KERNEL supported cpus:
Jan 24 06:56:48 callous-MS-7B45 kernel: Intel GenuineIntel
Jan 24 06:56:48 callous-MS-7B45 kernel: AMD AuthenticAMD
Jan 24 06:56:48 callous-MS-7B45 kernel: Hygon HygonGenuine
Jan 24 06:56:48 callous-MS-7B45 kernel: Centaur CentaurHauls
Jan 24 06:56:48 callous-MS-7B45 kernel: zhaoxin Shanghai
Jan 24 06:56:48 callous-MS-7B45 kernel: x86/fpu: Supporting XSAVE feature 0x001:
Jan 24 06:56:48 callous-MS-7B45 kernel: x86/fpu: Supporting XSAVE feature 0x002:
Jan 24 06:56:48 callous-MS-7B45 kernel: x86/fpu: Supporting XSAVE feature 0x004:
Jan 24 06:56:48 callous-MS-7B45 kernel: x86/fpu: Supporting XSAVE feature 0x008:
Jan 24 06:56:48 callous-MS-7B45 kernel: x86/fpu: Supporting XSAVE feature 0x010:
Jan 24 06:56:48 callous-MS-7B45 kernel: x86/fpu: xstate_offset[2]: 576, xstate_
Jan 24 06:56:48 callous-MS-7B45 kernel: x86/fpu: xstate_offset[3]: 832, xstate_
Jan 24 06:56:48 callous-MS-7B45 kernel: x86/fpu: xstate_offset[4]: 896, xstate_
Jan 24 06:56:48 callous-MS-7B45 kernel: x86/fpu: Enabled xstate features ...

[Sebastien Bacher (seb128)]

What's the output of those commands?
$ dpkg -l | grep software-propoerties
$ debsums software-properties-common
(you might need to install debsums if the command is not available)

[Sebastian Straszak (callous4567)]

dpkg -l | grep software-properties
ii python3-software-properties 0.98.5 all manage the repositories that you install software from
ii software-properties-common 0.98.5 all manage the repositories that you install software from (common)
ii software-properties-gtk 0.98.5 all manage the repositories that you install software from (gtk)

debsums software-properties-common
/usr/bin/add-apt-repository OK
/usr/lib/python3/dist-packages/softwareproperties/dbus/SoftwarePropertiesDBus.py OK
/usr/lib/python3/dist-packages/softwareproperties/dbus/__init__.py OK
/usr/lib/software-properties/software-properties-dbus OK
/usr/share/dbus-1/system-services/com.ubuntu.SoftwareProperties.service OK
/usr/share/doc/software-properties-common/copyright OK
/usr/share/man/man1/add-apt-repository.1.gz OK
/usr/share/polkit-1/actions/com.ubuntu.softwareproperties.policy OK