Comment 6 for bug 1157678

Created attachment 70129
correct background image

$ xrandr
Screen 0: minimum 320 x 200, current 2960 x 1050, maximum 32767 x 32767
LVDS1 connected 1680x1050+0+0 (normal left inverted right x axis y axis) 331mm x 207mm
   1680x1050 60.0*+ 50.0
   1400x1050 60.0
   1280x1024 60.0
   1280x960 60.0
   1024x768 60.0
   800x600 60.3 56.2
   640x480 59.9
VGA1 connected 1280x1024+1680+0 (normal left inverted right x axis y axis) 338mm x 270mm
   1280x1024 60.0*+ 75.0
   1280x960 60.0
   1280x800 74.9 59.8
   1152x864 75.0
   1280x768 74.9 59.9
   1024x768 75.1 70.1 60.0
   1024x576 60.0
   800x600 72.2 75.0 60.3 56.2
   848x480 60.0
   640x480 72.8 75.0 60.0
   720x400 70.1

To get correct background picture - only refresh event is usually required - i.e. to move some window over the background