i tested 1: from proposed and the boot process was faster

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  gpu-manager's drm output detection affects boot time

Status in ubuntu-drivers-common package in Ubuntu:
  Fix Released
Status in ubuntu-drivers-common source package in Xenial:
  Fix Committed

Bug description:
  SRU request:

  The current drm code to probe the connected outputs is too resource 
intensive, and slow down the boot process.

  [Test Case]
  1) Boot Ubuntu and run the following command, looking for gpu-manager:
  systemd-analize blame

  This will show how long gpu-manager took. Write down the number

  2) Install the package from -proposed, and run systemd-analize blame.
  See if the number has become smaller.

  [Regression Potential]
  Low, all the changes are already included in Yakkety.

  Rather than calling drm directly, gpu-manager should simply check the outputs 
connector status by using the sysfs filesystem (e.g. 
/sys/class/drm/card0-HDMI-A-1/status, etc.), thus relying on data that is 
already available.

  This should make gpu-manager a bit less resource intensive, especially
  on boot.

  The attached perf shows the problem in gpu-manager.

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