LTSP client shows Launcher when screen is locked and while having applications in full screen mode

[variona]

1)"Description: Ubuntu 12.04.2 LTS"
Release: 12.04
on server and ltsp client
2)"Installiert: 5.18.0-0ubuntu2"
on server and ltsp client
3)I expect the launcher to be hidden when the screen is locked and in the background when I switch an application to full screen
4)The launcher stays visible

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.18.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.5.0-28.48~precise1-generic 3.5.7.9
Uname: Linux 3.5.0-28-generic i686
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Ist ein Verzeichnis: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86 Kernel Module 304.88 Wed Mar 27 14:31:12 PDT 2013
 GCC version: gcc-Version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
.proc.driver.nvidia.warnings.fbdev:
 Your system is not currently configured to drive a VGA console
 on the primary VGA device. The NVIDIA Linux graphics driver
 requires the use of a text-mode VGA console. Use of other console
 drivers including, but not limited to, vesafb, may result in
 corruption and stability problems, and is not supported.
.tmp.unity.support.test.1:

ApportVersion: 2.0.1-0ubuntu17.2
Architecture: i386
CompizPlugins: [core,composite,opengl,decor,mousepoll,vpswitch,compiztoolbox,grid,workarounds,wall,move,resize,gnomecompat,place,regex,imgpng,snap,scale,session,expo,ezoom]
CompositorRunning: None
Date: Sat May 4 18:31:00 2013
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
GraphicsCard:
 NVIDIA Corporation C51PV [GeForce 6150] [10de:0240] (rev a2) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. A8N-VM CSM [1043:81cd]
JockeyStatus:
 xorg:nvidia_173_updates - Beschleunigter Grafiktreiber von NVIDIA (Nachträgliche Aktualisierungen) (Proprietär, Deaktiviert, Nicht benutzt)
 xorg:nvidia_current - Beschleunigter Grafiktreiber von NVIDIA (Proprietär, Aktiviert, In Benutzung)
 xorg:nvidia_current_updates - Beschleunigter Grafiktreiber von NVIDIA (Nachträgliche Aktualisierungen) (Proprietär, Deaktiviert, Nicht benutzt)
Lsusb:
 Bus 001 Device 003: ID 05e3:070e Genesys Logic, Inc. USB 2.0 Card Reader
 Bus 002 Device 002: ID 046d:c52e Logitech, Inc.
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: System manufacturer System Product Name
MarkForUpload: True
ProcEnviron:
 LANGUAGE=de_AT.utf8
 TERM=xterm
 PATH=(custom, no user)
 LANG=de_AT.utf8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-28-generic root=UUID=88130c85-b525-4b20-b34c-b991dab5f7e0 ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
XorgConf:
 Section "Device"
  Identifier "Default Device"
  Option "NoLogo" "True"
 EndSection
dmi.bios.date: 06/21/2007
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: ASUS M2NPV-VM ACPI BIOS Revision 1001
dmi.board.name: M2NPV-VM
dmi.board.vendor: ASUSTek Computer INC.
dmi.board.version: 1.xx
dmi.chassis.asset.tag: 123456789000
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvrASUSM2NPV-VMACPIBIOSRevision1001:bd06/21/2007:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTekComputerINC.:rnM2NPV-VM:rvr1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
version.compiz: compiz 1:0.9.7.12-0ubuntu1
version.libdrm2: libdrm2 2.4.39-0ubuntu0.2
version.libgl1-mesa-dri: libgl1-mesa-dri N/A
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core N/A
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A

[variona (variona)]

It is "kind of a duplicate":
/usr/bin/nvidia-settings added the Display of another LTSP client to the configuration therefore I'd say it is a duplicate of https://bugs.launchpad.net/compiz/+bug/886605