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[Bug 1434372] Re: [Lenovo E555] Screen of labtop will become black and never lighting after un-plug VGA cable


@Gabriel, can you attach `xrandr --verbose` when it works normally and
when it fails.

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  [Lenovo E555] Screen of labtop will become black and never lighting
  after un-plug VGA cable

Status in HWE Next Project:
Status in linux-lts-utopic package in Ubuntu:

Bug description:
  CID: 201408-15472 Lenovo E555 (A+A) with 14.04.2 (utopic)

  1. Install 14.04.2 on E555
  2. Install fglrx
  3. Reboot system and log in 
  4. Plug in a VGA cable and switch 4 modes by display key. (external, internal, extand and mirror)
  5. Un-plug VGA cable, observe screen result.

  Expected results:
  Labtop screen display normally.

  Actual result:
  Labtop screen became black and never lighting. Only press power button off/on machine, that could make screen light again.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.16.0-30-generic 3.16.0-30.40~14.04.1 [modified: boot/vmlinuz-3.16.0-30-generic]
  ProcVersionSignature: Ubuntu 3.16.0-30.40~14.04.1-generic 3.16.7-ckt3
  Uname: Linux 3.16.0-30-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.14.1-0ubuntu3.7
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Thu Mar 19 23:58:26 2015
  InstallationDate: Installed on 2015-03-18 (1 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  SourcePackage: linux-lts-utopic
  UpgradeStatus: No upgrade log present (probably fresh install)

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