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[Bug 1580553] [NEW] Inactive screen on laptop turns back on immediately after blanking


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Inactive laptop screen fades to blank, then immediately brightens again
showing the login screen, and stays lit.

This happens whether the laptop if charging or running on battery.

The problem occurs with both the gnome screensaver package installed and
with xscreensaver.

Indicators in the status bar in addition to the default ones include 
Classic Menu indicator
Dropbox indicator
System Load indicator
(I have been running the same set of indicators on a different, 14.04, laptop without them interfering with screen blanking behavior)

Charging with the screen lit seems very slow and discharge seems fast,
but this is a new laptop that came with 16.04 installed, so I don't
really have a basis for comparison.

I have not installed TLP on this laptop.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: apport 2.20.1-0ubuntu2
ProcVersionSignature: Ubuntu 4.4.0-22.39-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CrashReports: 664:108:116:11903:2016-05-07 00:23:37.423810907 -0500:2016-05-07 00:23:37.423810907 -0500:/var/crash/_sbin_upstart.108.crash
CurrentDesktop: Unity
Date: Wed May 11 06:03:10 2016
PackageArchitecture: all
SourcePackage: apport
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.default.apport: [modified]
mtime.conffile..etc.default.apport: 2016-04-28T21:07:24.472000

** Affects: linux-meta (Ubuntu)
     Importance: Undecided
         Status: New

** Tags: amd64 kernel-bug xenial
Inactive screen on laptop turns back on immediately after blanking
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