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[Po-Hsu Lin <po-hsu.lin@xxxxxxxxxxxxx>]

It seems that this issue does not exist in the drm-intel-nightly kernel
at http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-
nightly/current/

Verified with Linux 201408-15444 4.0.0-994-generic #201503240206

Also, this issue does not exist on another I+N system (201408-15447 Dell Vostro 3449)
even though that system looks like running on the Intel driver.

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https://bugs.launchpad.net/bugs/1434514

Title:
  Unity will act erratically after connecting to an external monitor
  [Intel Broadwell-U][8086:1616]

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

Bug description:
  CID: 201408-15444 Dell Vostro

  The desktop will act erratically after connect to an external monitor,

  * First thing is the content of "System Settings" will gone when the window is not in focus.
  * The characters like "l", "i" will be missing from the console.
  This won't back to normal even if you unplugged the monitor.
  * The title of firefox also missing some characters, like R, U, x, z, F
  But if you resize it to full screen, it will back to normal

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.16.0-31-generic 3.16.0-31.43~14.04.1
  ProcVersionSignature: Ubuntu 3.16.0-31.43~14.04.1-generic 3.16.7-ckt5
  Uname: Linux 3.16.0-31-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.14.1-0ubuntu3.7
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Fri Mar 20 05:18:26 2015
  InstallationDate: Installed on 2015-03-20 (0 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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