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[doug <r.d.vaughan@xxxxxxxxxx>]

The Jamu error is solely a configuration issue. Jamu can only be run on a MythTV backend. When Jamu starts it gets the machines IP address and hostname then checks the MythTV database to see if that IP address is included in the "settings" table "BackendServerIP" and the matching "hostname". 
So either there is no such record or the "hosts" file does not have a hostname with the machines IP address. In any event the only down side of this error is that the Jamu MCC plugin will not show up in the MCC and Jamu cannot be run on the machine in question.
The MCC will not hang due to this error.

-- 
MCC hangs with Jamu-related error on frontend (new install)
https://bugs.launchpad.net/bugs/647367
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Status in “mythbuntu-common” package in Ubuntu: New

Bug description:
Binary package hint: mythbuntu-control-centre

I have done a clean install of Mythbuntu 10.04 on an Acer Revo, and have selected frontend-only during install.

When I launch MCC I get errors related to Jamu and backend:

tony@myth-front:~$ mythbuntu-control-centre
WARNING: With any -M option Jamu and its MCC plugin must be run on a MythTV backend,
Error(Could not find setting 'BackendServerIP' on host 'myth-front')
CRITICAL: Jamu configuration plugin must be run on a MythTV backend. Local host (myth-front) is not a MythTV backend.

WARNING: Error loading plugin <class 'jamuconfig.JamuconfigPlugin'>
Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/MythbuntuControlCentre/plugin.py", line 75, in find_plugin_instances
    self._instances[plugin] = plugin()
  File "/usr/share/mythbuntu/plugins/python/jamuconfig.py", line 100, in __init__
    raise JamuconfigPlugin_error(errormsg)
JamuconfigPlugin_error: Jamu configuration plugin must be run on a MythTV backend. Local host (myth-front) is not a MythTV backend.

Reading package lists... Done
Building dependency tree       
Reading state information... Done

When I try to change the SQL pin for remote access  to the backend the MCC GUI hangs with these errors in the terminal:

Traceback (most recent call last):
  File "/usr/bin/mythbuntu-control-centre", line 264, in summaryApply
    plugin.user_scripted_changes(self.reconfigure_user[item])
  File "/usr/share/mythbuntu/plugins/python/mysql_configuration.py", line 161, in user_scripted_changes
    if item == "securitypin":
NameError: global name 'item' is not defined

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: mythbuntu-control-centre 0.62-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.32-24.43-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-24-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Sat Sep 25 10:39:48 2010
InstallationMedia: Mythbuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100427.1)
PackageArchitecture: all
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: mythbuntu-control-centre