Comment 0 for bug 1617471

After locking screen and as a result the monitor going into sleep mode, I can't get the login screen anymore, the monitor stays in sleep mode forever.
In previous Ubuntu versions after pressing any key or the mouse, the login screen showed up, but not anymore. I have to restart the computer.

lsb_release -rd:
Description: Ubuntu 16.04.1 LTS
Release: 16.04

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+13ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15
Uname: Linux 4.4.0-34-generic x86_64
.tmp.unity_support_test.0:

ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Fri Aug 26 23:19:23 2016
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] RV410 [Radeon X700] [1002:5e4f] (prog-if 00 [VGA controller])
   Subsystem: Gigabyte Technology Co., Ltd RV410 [Radeon X700] [1458:2120]
   Subsystem: Gigabyte Technology Co., Ltd Device [1458:2121]
InstallationDate: Installed on 2016-07-12 (45 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
Lsusb:
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 002: ID 045e:0734 Microsoft Corp. Wireless Optical Desktop 700
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: FUJITSU SIEMENS P5SD1-FM2
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-34-generic root=UUID=b2c81b2b-163d-41b4-869a-67882349ae49 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/03/2006
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0304
dmi.board.name: P5SD1-FM2
dmi.board.vendor: FUJITSU SIEMENS
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0304:bd01/03/2006:svnFUJITSUSIEMENS:pnP5SD1-FM2:pvrSystemVersion:rvnFUJITSUSIEMENS:rnP5SD1-FM2:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: P5SD1-FM2
dmi.product.version: System Version
dmi.sys.vendor: FUJITSU SIEMENS
version.compiz: compiz 1:0.9.12.2+16.04.20160801.3-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1ubuntu0.16.04.2
version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2.1
version.xserver-xorg-core: xserver-xorg-core 2:1.18.3-1ubuntu2.3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2
xserver.bootTime: Fri Aug 26 23:12:08 2016
xserver.configfile: default
xserver.devices:
 input Power Button KEYBOARD, id 6
 input Power Button KEYBOARD, id 7
 input Liteon Microsoft® Wireless Receiver 700 v2.0 KEYBOARD, id 8
 input Liteon Microsoft® Wireless Receiver 700 v2.0 KEYBOARD, id 9
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.18.3-1ubuntu2.3
xserver.video_driver: radeon