[Bug 828850] Re: software-properties-gtk crashed with DBusException in call_blocking(): com.ubuntu.SoftwareProperties.PermissionDeniedByPolicy: com.ubuntu.softwareproperties.applychanges

[Edward Donovan]

For future reference, the exception is raised here, in the code:

  http://bazaar.launchpad.net/~ubuntu-core-dev/software-
properties/main/view/head:/softwareproperties/dbus/SoftwarePropertiesDBus.py#L356

The last line of this block:

  if not is_auth:
              logging.debug('_check_polkit_privilege: sender %s on connection %s pid %i is not authorized for %s: %s' %
                      (sender, conn, pid, privilege, str(details)))
              self.AuthFailed()
              raise PermissionDeniedByPolicy(privilege)

I don't know enough about python error handling, right now.  I tried
just commenting out the "raise" line, but that did not seem to be
enough.  The behaviour didn't seem to change at all, though, so perhaps
I got the whole thing wrong.

Anyone here very familiar with to handling python exceptions quietly?
This could be a very easy fix for someone with experience.

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https://bugs.launchpad.net/bugs/828850

Title:
  software-properties-gtk crashed with DBusException in call_blocking():
  com.ubuntu.SoftwareProperties.PermissionDeniedByPolicy:
  com.ubuntu.softwareproperties.applychanges

Status in “software-properties” package in Ubuntu:
  Triaged

Bug description:
  This is reproducible by launching software-properties-gtk as any user
  that is not an admin, or from any session where the user can't be
  verified to be an admin via policykit - including when the user hits
  'cancel' in the authentication dialog. We should suppress these
  exceptions so they don't show up as crashes on the desktop.

  ProblemType: Crash
  DistroRelease: Ubuntu 11.10
  Package: software-properties-gtk 0.81.8
  ProcVersionSignature: Ubuntu 3.0.0-8.11-generic 3.0.1
  Uname: Linux 3.0.0-8-generic x86_64
  Architecture: amd64
  Date: Thu Aug 11 14:27:10 2011
  ExecutablePath: /usr/bin/software-properties-gtk
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110705)
  InterpreterPath: /usr/bin/python2.7
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python /usr/bin/software-properties-gtk -n -t 132120584
  ProcCwd: /home/yehuda/Documents
  ProcEnviron:
   LANGUAGE=en_CA:en
   PATH=(custom, no user)
   LANG=en_CA.UTF-8
   SHELL=/bin/bash
  PythonArgs: ['/usr/bin/software-properties-gtk', '-n', '-t', '132120584']
  SourcePackage: software-properties
  Title: software-properties-gtk crashed with DBusException in call_blocking(): com.ubuntu.SoftwareProperties.PermissionDeniedByPolicy: com.ubuntu.softwareproperties.applychanges
  UpgradeStatus: Upgraded to oneiric on 2011-07-27 (21 days ago)
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

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