unity-tweak-tool crashed with dbus.exceptions.DBusException in call_blocking(): org.freedesktop.DBus.Error.Spawn.ChildExited: Process /usr/bin/unity-tweak-tool exited with status 1

We had another user report exactly the same bug, but later reported that the bug magically fixed itself.
Also, I have not yet figured out what might have caused this.

Can you delete the folder ~/.config/unity-tweak-tool and try to open the application again? If the application crashes and a file debug.log is generated in ~/.config/unity-tweak-tool , please add it as an attachment to this bug report.

I encountered this bug just 20 minutes ago, purged, reinstalled, no fix.

I far as I can tell, this is caused by ~/.config/unity-tweak-tool/pid.lockfile not being deleted on exit. After a while the pid in that file can be another random process, and trying to connect to it on startup as a unity-tweak-tool process will crash.

Workaround is to manually delete ~/.config/unity-tweak-tool/pid.lockfile when this happens

After a quick look at the code, something like this patch works for me, but I haven't tested it much yet.

ok thank u

On Sat, May 18, 2013 at 9:21 PM, Michael Blennerhassett <
<email address hidden>> wrote:

> After a quick look at the code, something like this patch works for me,
> but I haven't tested it much yet.
>
> ** Patch added: "delete_lockfile.patch"
>
> https://bugs.launchpad.net/unity-tweak-tool/+bug/1168738/+attachment/3680562/+files/delete_lockfile.patch
>
> --
> You received this bug notification because you are subscribed to a
> duplicate bug report (1173342).
> https://bugs.launchpad.net/bugs/1168738
>
> Title:
> unity-tweak-tool crashed with dbus.exceptions.DBusException in
> call_blocking(): org.freedesktop.DBus.Error.Spawn.ChildExited: Process
> /usr/bin/unity-tweak-tool exited with status 1
>
> Status in Unity Tweak Tool:
> Confirmed
>
> Bug description:
> crashed after load
>
> ProblemType: Crash
> DistroRelease: Ubuntu 13.04
> Package: unity-tweak-tool 0.0.5-0~119~raring1 [origin:
> LP-PPA-freyja-dev-unity-tweak-tool-daily]
> ProcVersionSignature: Ubuntu 3.8.0-18.28-generic 3.8.6
> Uname: Linux 3.8.0-18-generic i686
> NonfreeKernelModules: wl
> ApportVersion: 2.9.2-0ubuntu8
> Architecture: i386
> CrashDB: {"impl": "launchpad", "project": "unity-tweak-tool"}
> Date: Sat Apr 13 22:11:26 2013
> EcryptfsInUse: Yes
> ExecutablePath: /usr/bin/unity-tweak-tool
> InstallationDate: Installed on 2013-04-13 (0 days ago)
> InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha i386
> (20130402.1)
> InterpreterPath: /usr/bin/python3.3
> MarkForUpload: True
> PackageArchitecture: all
> ProcCmdline: /usr/bin/python3 /usr/bin/unity-tweak-tool
> PythonArgs: ['/usr/bin/unity-tweak-tool']
> SourcePackage: unity-tweak-tool
> Title: unity-tweak-tool crashed with dbus.exceptions.DBusException in
> call_blocking(): org.freedesktop.DBus.Error.Spawn.ChildExited: Process
> /usr/bin/unity-tweak-tool exited with status 1
> UpgradeStatus: No upgrade log present (probably fresh install)
> UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/unity-tweak-tool/+bug/1168738/+subscriptions
>

Thanks Michael!

Since your patch doesn't introduce any new issues, and you reported it solves this issue, I figured it is worth a shot. Merged in https://github.com/freyja-dev/unity-tweak-tool/commit/73d9ecbbeb6969d8a981032051308f25cf6e0131 with attribution. :)

@all The PPA should be updated in less than a day. If the next update solves this issue, please comment the same so that this bug can be marked fix-released.

Cheers,
JPM.

The attachment "delete_lockfile.patch" seems to be a patch. If it isn't, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issues please contact him.]

Status changed to 'Confirmed' because the bug affects multiple users.

Since the patch seems to solve the issue, I've marked this fix-released for PPA and fix-committed for Ubuntu archive

This bug was fixed in the package unity-tweak-tool - 0.0.5

---------------
unity-tweak-tool (0.0.5) saucy; urgency=low

  [ J Phani Mahesh ]
  * New upstream release (LP: #1226059)
    - New application icon
    - Show error dialog when schemas are missing instead of crashing
    - Trigger new build of pot files
  * UnityTweakTool/section/unity.py
    - Fix Show recently used and more suggestions in dash search (LP: #1166294)
    - Fix Launcher reveal sensitivity scale update issues (LP: #1168863)
  * UnityTweakTool/elements/colorchooser.py
    - Fix TypeError in get_rgba() (LP: #1165627)
    - Fix segmentation fault on selecting custom launcher (LP: #1190398)
  * UnityTweakTool/elements/option.py
    - Fix "Restore defaults" button (LP: #1186634)
  * UnityTweakTool/__init__.py
    - Fix unity-tweak-tool crashed with dbus.exceptions.DBusException in
    call_blocking() (LP: #1168738)
    - Fix FileNotFoundError (LP: #1225463)
    - Fix dbus.exceptions.DBusException (LP: #1170571)
  * data/unity.ui
    - Remove Panel transparency switch (LP: #1168836)
    - Remove Launcher transparency switch (LP: #1168834)

  [ Barneedhar Vigneshwar ]
  * UnityTweakTool/section/unity.py
    - Fix 'Can't set background blur to static' (LP: #1167343)
    - Fix non-working Launcher only on primary desktop (LP: #1173977)
  * UnityTweakTool/section/sphagetti/compiz.py
    - Fix TypeError in color_to_hash() (LP: #1166884)
 -- Barneedhar Vigneshwar <email address hidden> Mon, 16 Sep 2013 19:34:38 +0530