Desktop hangs after turning screen off, no input for a few seconds

[Raphael Alexander Marx]

After my laptop turns its screen off, when I use the mouse or keyboard to wake it up, there's no input for a few seconds and the screen stays in a dimmed state.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: xorg 1:7.7+7ubuntu4
ProcVersionSignature: Ubuntu 4.2.0-10.11-generic 4.2.0
Uname: Linux 4.2.0-10-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.18.1-0ubuntu1
Architecture: amd64
CurrentDesktop: KDE
Date: Wed Sep 16 15:05:42 2015
InstallationDate: Installed on 2015-09-14 (1 days ago)
InstallationMedia: Kubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150825.1)
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)

[penalvch (penalvch)]

Raphael Alexander Marx, thank you for reporting this and helping make Ubuntu better. Could you please run the following command from a terminal as it will automatically gather and attach updated debug information to this report:

apport-collect -p xorg 1496393

Please ensure you have xdiagnose installed, and that you click the Yes button for attaching additional debugging information.

[Launchpad Janitor (janitor)]

[Expired for xorg (Ubuntu) because there has been no activity for 60 days.]