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[Bug 1056412] Re: White flash when coming back from "Show desktop"

 

When I  use "." to hide live, I also get the following:

2014-10-21 16:20:21,543 openlp.core.ui.maindisplay.MainDisplay                  DEBUG    Entering hide_display
2014-10-21 16:20:21,543 openlp.core.ui.maindisplay.MainDisplay                  DEBUG    hide_display mode = 1
2014-10-21 16:20:21,544 openlp.core.common.registry                             ERROR    OpenLP Error trace
   File ./openlp.py at line 44 
         called main()
   File /home/ken/program/python/openlp-bzr/trunk/openlp/core/__init__.py at line 332 
         called sys.exit(application.run(qt_args))
   File /home/ken/program/python/openlp-bzr/trunk/openlp/core/common/openlpmixin.py at line 61 
         called return func(*args, **kwargs)
   File /home/ken/program/python/openlp-bzr/trunk/openlp/core/__init__.py at line 160 
         called return self.exec_()
   File /home/ken/program/python/openlp-bzr/trunk/openlp/core/common/openlpmixin.py at line 61 
         called return func(*args, **kwargs)
   File /home/ken/program/python/openlp-bzr/trunk/openlp/core/__init__.py at line 98 
         called result = QtGui.QApplication.exec_()
   File /home/ken/program/python/openlp-bzr/trunk/openlp/core/common/openlpmixin.py at line 61 
         called return func(*args, **kwargs)
   File /home/ken/program/python/openlp-bzr/trunk/openlp/core/ui/slidecontroller.py at line 928 
         called self.blank_plugin()
   File /home/ken/program/python/openlp-bzr/trunk/openlp/core/common/openlpmixin.py at line 61 
         called return func(*args, **kwargs)
   File /home/ken/program/python/openlp-bzr/trunk/openlp/core/ui/slidecontroller.py at line 985 
         called self.service_item.name.lower(), [self.service_item, self.is_live, hide_mode])
   File /home/ken/program/python/openlp-bzr/trunk/openlp/core/common/registry.py at line 156 
         called trace_error_handler(log)
   File /home/ken/program/python/openlp-bzr/trunk/openlp/core/common/__init__.py at line 59 
         called for tb in traceback.extract_stack():
2014-10-21 16:20:21,545 openlp.core.common.registry                             ERROR    Event songs_blank called but not registered

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https://bugs.launchpad.net/bugs/1056412

Title:
  White flash when coming back from "Show desktop"

Status in OpenLP - Worship Presentation Software:
  New

Bug description:
  1. Use dark backgroud for your slide and desktop, black would work fine.
  2. Send something live
  3. Press D repeatedly to see how every time live window is recreated it flashes white.

  Some probably flawed ideas how to prevent this:
  Send first extra short webpage with only background information (when using images it would still take some time and might not work so good)
  Start window minimized and show it after it has finished rendering
  Start window somewhere else and move it to the right position after it has finished rendering

  Or maybe this is not fixable. But at least we gave a thought :)

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References