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[Phill <1490981@xxxxxxxxxxxxxxxxxx>]

** Changed in: openlp
   Importance: Undecided => Low

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https://bugs.launchpad.net/bugs/1490981

Title:
  Traceback after changing display

Status in OpenLP:
  New

Bug description:
  I changed display  setting to display n.2 and service list theme to
  something else from  null, after restart I was met by a traceback.

  This happens sometimes when display is changed.

  Running Portable 2.1.6 / Win 8.1

  Traceback (most recent call last):
  File "c:\Python33\lib\site-packages\win32com\client\dynamic.py", line 89, in _GetGoodDispatch
  IDispatch = pythoncom.connect(IDispatch)
  pywintypes.com_error: (-2147221021, 'Operation unavailable', None, None)

  During handling of the above exception, another exception occurred:

  Traceback (most recent call last):
  File "D:\OpenLP_Development\OpenLP_Code\2.1\openlp\core\lib\screen.py", line 96, in screen_resolution_changed
  File "D:\OpenLP_Development\OpenLP_Code\2.1\openlp\core\common\registry.py", line 137, in execute
  File "D:\OpenLP_Development\OpenLP_Code\2.1\openlp\core\ui\mainwindow.py", line 1050, in screen_changed
  File "D:\OpenLP_Development\OpenLP_Code\2.1\openlp\core\common\openlpmixin.py", line 58, in wrapped
  File "D:\OpenLP_Development\OpenLP_Code\2.1\openlp\core\common\openlpmixin.py", line 54, in wrapped
  File "D:\OpenLP_Development\OpenLP_Code\2.1\openlp\core\lib\renderer.py", line 80, in update_display
  AttributeError: 'Renderer' object has no attribute 'display'

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