I am using Ubuntu Karmic on a Latitude E5400 and I am using an external
screen. Sometimes windows just disappear from the screen and I have to
log out and inn for things to work normal. This happens after I have
resumed from suspend or changed the xrandr settings. In my messages log
I get the following message that might be relevant:

[95572.050956] i2c-adapter i2c-4: unable to read EDID block.
[95572.050958] i915 0000:00:02.0: HDMI Type A-2: no EDID data


** Attachment added: "parts of /var/log/messages"
   http://launchpadlibrarian.net/36617539/messages

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Dissappearing Windows - Bermuda Triangle
https://bugs.launchpad.net/bugs/418118
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