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[Richard Elkins <richard.elkins@xxxxxxxxx>]

One year after I reported it fixed, it was still maked "undecided" and
"new".  I just marked it "fix released" because it appears so and has
not reappeared.

** Changed in: lightdm (Ubuntu)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1229450

Title:
  Disabling superfluous "Laptop" display output hangs reboot
  somewhere(?)

Status in lightdm package in Ubuntu:
  Fix Released

Bug description:
  I made a guess at the applicable package;  apologies if I guessed
  wrong.  I could have guessed grub-common as well.

  Just installed Xubuntu Saucy Beta-2 today alongside of another OS (Linux Mint 15 Mate).
  Mini-ITX motherboard home-build: Intel D2550MUD2 (Intel Atom 2550 GMA3650 i.e. Cedartrail).
  The motherboard BIOS has not been updated since I purchased the motherboard.
  In general, I have no complaints about quality and speed of Xubuntu Saucy components that were automatically selected:
     * Kernel graphics module: gma500_gfx.
     * Xorg video driver: Modesetting.

  One oddity that I do not understand:  in the Settings Manager > Hardware > Display application, it shows me two displays:
     * Acer Technologies 22" (correct)
     * "Laptop" (This is fictitious.  How could have it been "detected"???)

  By default, both displays have "Use this output" checked i.e. enabled.
  When "Laptop" is enabled, it overlays part of the actual Acer display.

  In the default situation, when I request a reboot function from the
  Panel-0 Session Menu reboot item, click on the Panel-0 reboot Action
  Button, or enter `sudo reboot` from a terminal window, rebooting
  proceeds consistently as expected.

  However, the "Laptop" display is a nuisance in these circumstances as
  it is not useful as it blocks part of the Acer display.  I thought
  this would be an easy fix: Uncheck "Use this output" for the "Laptop"
  display and accept the changes.  However, when I subsequently request
  a reboot from one of the actions described above, the shutdown aspect
  of the reboot process seems to hang up somewhere because the
  motherboard BIOS never restarts.

  To summarize, 
     * "Laptop" enabled:  Reboot always proceeds.
     * "Laptop" disabled:  Reboot always hangs.

  The attached extra debug information will be automatically collected
  in the "Laptop" disabled case.

  I would appreciate it if someone with a more mainstream motherboard than mine and only one physical monitor would do the following and report back:
  1. After installation, how many displays are presented?
  2. If there are two, please try what I did above. 

  Thank you.

  If it turns out that this is just another Intel "feature" in Cedar
  Trail (one of the abandoned Intel motherboard product), I'll have to
  resigning myself to cursing a lot [(-:], installing Windoze 7 on this
  rig, and selling it on eBay!  )-:

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: xfce4-taskmanager 1.0.0-3
  ProcVersionSignature: Ubuntu 3.11.0-8.15-generic 3.11.1
  Uname: Linux 3.11.0-8-generic x86_64
  ApportVersion: 2.12.4-0ubuntu1
  Architecture: amd64
  Date: Mon Sep 23 16:39:26 2013
  InstallationDate: Installed on 2013-09-23 (0 days ago)
  InstallationMedia: Xubuntu 13.10 "Saucy Salamander" - Beta amd64 (20130923.1)
  MarkForUpload: True
  SourcePackage: xfce4-taskmanager
  UpgradeStatus: No upgrade log present (probably fresh install)

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