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[rachetfoot <jason@xxxxxxxxxx>]

I've had this issue on my T450s with 15.04 MATE since March. I've also
had the issue where the screen is completely black after resume and I
need to change screens (Alt-Ctrl-F2, Alt-Ctrl-F7) to get the window
manager back. This happens on external screens (Ultradock) and on the
built-in screen. I will try UXA to see if that solves things.

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https://bugs.launchpad.net/bugs/1452318

Title:
  Faulty behavior when resuming from suspend

Status in xserver-xorg-video-intel package in Ubuntu:
  Confirmed

Bug description:
  Waking from suspend, everything seems normal, except the graphical
  elements and text on my desktop are not drawn properly. Sometimes,
  moving the mouse over icons can cause them to be redrawn, sometimes
  not. It appears not to matter how I initiate the suspend (e.g. by
  closing laptop lid, or by calling pm-suspend explicitly) and it
  appears not to matter whether I am using an external display or the
  laptop's own screen.

  All other hardware appears to be working, and I can restart the laptop
  by clicking where the icons ought to be. The only symptom seems to be
  that the drawing does not happen correctly.

  I'm not sure what additional information I should provide to help
  diagnose the problem, so please advise me.

  Also, if this is more likely to be a xfce issue, then please change
  the package on the bug report.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: pm-utils 1.4.1-15
  ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3
  Uname: Linux 3.19.0-16-generic x86_64
  NonfreeKernelModules: openafs
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Wed May  6 17:17:51 2015
  InstallationDate: Installed on 2015-05-04 (1 days ago)
  InstallationMedia: Xubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422.1)
  PackageArchitecture: all
  SourcePackage: pm-utils
  UpgradeStatus: No upgrade log present (probably fresh install)

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