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[Bug 1355562] Re: An "Unknown" display appears with no external display connected on 12.04.5

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: Po-Hsu Lin <po-hsu.lin@xxxxxxxxxxxxx>
Date: Fri, 30 Jan 2015 06:45:16 -0000
Reply-to: Bug 1355562 <1355562@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

Hello Anthony,

I have verified this with 12.04.5 + linux-
image-3.19.0-994-generic_3.19.0-994.201501292105_amd64 on  201209-11641,
this issue still exist.

** Changed in: hwe-next
       Status: Incomplete => Confirmed

** Changed in: linux-lts-trusty (Ubuntu)
       Status: Incomplete => Confirmed

** Changed in: linux-lts-trusty (Ubuntu)
     Assignee: Po-Hsu Lin (cypressyew) => (unassigned)

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https://bugs.launchpad.net/bugs/1355562

Title:
  An "Unknown" display appears with no external display connected on
  12.04.5

Status in HWE Next Project:
  Confirmed
Status in linux-lts-trusty package in Ubuntu:
  Confirmed

Bug description:
  CID: 201202-10511 Dell Inspiron 5420

  After boot to desktop, there will be an "Unknown" display work as an
  extended display on this system with 12.04.5

  The problem with this issue is that you will be able to move the
  cursor out of your screen, even open an application on the extended
  display.

  Steps:
  1. Install 12.04.5, boot to desktop with no external monitor connected
  2. Open the "Display" utility, check whether there is an "Unknown" display

  Expected result:
  * There should be only a "Laptop" display

  Actual result:
  * An "Unknown" display available

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.13.0-32-generic 3.13.0-32.57~precise1 [modified: boot/vmlinuz-3.13.0-32-generic]
  ProcVersionSignature: Ubuntu 3.13.0-32.57~precise1-generic 3.13.11.4
  Uname: Linux 3.13.0-32-generic x86_64
  ApportVersion: 2.0.1-0ubuntu17.6
  Architecture: amd64
  Date: Mon Aug 11 22:36:12 2014
  InstallationMedia: Ubuntu 12.04.5 LTS "Precise Pangolin" - Release amd64 (20140807.1)
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: linux-lts-trusty
  UpgradeStatus: No upgrade log present (probably fresh install)

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