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[Nick Demou <ndemou@xxxxxxxxxx>]

Yes, the problem went away with the new DP2VGA converter! I'm plugging
it and the external monitor gets immediately recognized. Sorry for the
noise in this report but I never would have thought that the DP2VGA
adapter would fail in such a strange way.

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https://bugs.launchpad.net/bugs/1300914

Title:
  External screen undetected after first plug

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  On Ubuntu 14.04, the external screen plugged on VGA is detected and get activated correctly.
  However, if I unplug it and then replug it later, it is not detected anymore and the screen receives no signal.

  A way to get it back to work is to reboot or simply suspend the
  computer.

  Sorry but I have no idea of what package is handling that.

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