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[Launchpad Bug Tracker <1586933@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package ubuntu-drivers-common - 1:0.4.20

---------------
ubuntu-drivers-common (1:0.4.20) yakkety; urgency=medium

  * Remove PackageKit plugin. This stopped working with packagekit 1.0 as its
    apt backend is gone and aptcc does not support plugins.
  * debian/control: Drop obsolete XS-Testsuite:.
  * Bump Standards-Version to 3.9.8.

 -- Martin Pitt <martin.pitt@xxxxxxxxxx>  Tue, 16 Aug 2016 11:46:36
+0200

** Changed in: ubuntu-drivers-common (Ubuntu)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1586933

Title:
  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:
  In Progress

Bug description:
  SRU request:

  [Impact]
  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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