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[Timo Aaltonen <tjaalton@xxxxxxxxxx>]

it's a kernel bug then

** Package changed: pm-utils (Ubuntu) => linux (Ubuntu)

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https://bugs.launchpad.net/bugs/1554509

Title:
  Screen remains black after resume from hibernation

Status in linux package in Ubuntu:
  Incomplete
Status in xserver-xorg-video-ati package in Ubuntu:
  New

Bug description:
  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.)
   - 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
  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
  SourcePackage: pm-utils
  UpgradeStatus: No upgrade log present (probably fresh install)

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