You have been subscribed to a public bug:
I was unsure what daemon actually controls suspending of a laptop when
the lid is closed, so filed under "I don't know.". After a fresh and
patched install of Xenial, when I open the lid to my laptop it will wake
up from suspend, however the LCD does not turn on, as far as I can tell
everything is actually working underneath but I need to do a hard
restart to make the machine usable again. My laptop is a Dell Latitude
E6440. I will gladly provide any info needed.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-desktop 1.347
ProcVersionSignature: Ubuntu 4.4.0-2.16-generic 4.4.0
Uname: Linux 4.4.0-2-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.19.4-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Feb 9 09:28:34 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2016-02-05 (4 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160204)
SourcePackage: ubuntu-meta
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug xenial
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After Xenial upgrade display will no longer turn on when waking from suspend.
https://bugs.launchpad.net/bugs/1543613
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