[Bug 1554509] Re: Screen remains black after resume from hibernation

[YS1]

** Attachment added: "lspci"
   https://bugs.launchpad.net/ubuntu/+source/pm-utils/+bug/1554509/+attachment/4592623/+files/lspci

** Description changed:

  I am currently testing Xubuntu 16.04 beta. Hibernation does not work
  properly.
  
  I ran sudo pm-hibernate, then rebooted.
  The hibernation part itself seems to work nice.
  
  Resuming presents the following behaviour :
-  - the booting sequence starts
-  - the console shows the progress of the resuming process (10%, 20%, etc.)
-  - then my monitor switches to graphical mode like I would expect, but it then remains black instead of showing my desktop. It does not go to "sleep mode" like it does when the computer is off or the DVI cable is disconnected.
+  - the booting sequence starts
+  - the console shows the progress of the resuming process (10%, 20%, etc.)
+  - my monitor switches to graphical mode like I would expect, but it then remains black instead of showing my desktop. It does not go to "sleep mode" like it does when the computer is off or the DVI cable is disconnected.
  
  The computer remains responsive, and if music was playing when
  hibernation started, it properly resumes. I can also use the keyboard
  (to run sudo reboot now, for example). Switching to another virtual
- consoles (Ctrl+Alt+1, Ctrl+Alt+7) does not improve the situation.
+ console (Ctrl+Alt+1, Ctrl+Alt+7) does not improve the situation.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: pm-utils 1.4.1-16
  ProcVersionSignature: Ubuntu 4.4.0-10.25-generic 4.4.3
  Uname: Linux 4.4.0-10-generic x86_64
  ApportVersion: 2.20-0ubuntu3
  Architecture: amd64
  Date: Tue Mar  8 14:03:50 2016
  InstallationDate: Installed on 2016-03-06 (2 days ago)
  InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160224)
  PackageArchitecture: all
  ProcEnviron:
-  LANGUAGE=fr_FR
-  TERM=xterm
-  PATH=(custom, no user)
-  LANG=fr_FR.UTF-8
-  SHELL=/bin/bash
+  LANGUAGE=fr_FR
+  TERM=xterm
+  PATH=(custom, no user)
+  LANG=fr_FR.UTF-8
+  SHELL=/bin/bash
  SourcePackage: pm-utils
  UpgradeStatus: No upgrade log present (probably fresh install)

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Title:
  Screen remains black after resume from hibernation

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