printing is not possible

[Schreiver]

KPrinter4 is not starting

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+13ubuntu3.1
ProcVersionSignature: Ubuntu 4.15.0-36.39~16.04.1-generic 4.15.18
Uname: Linux 4.15.0-36-generic x86_64
.tmp.unity_support_test.0:

ApportVersion: 2.20.1-0ubuntu2.18
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
Date: Tue Oct 23 10:50:33 2018
DistUpgraded: 2018-09-12 14:00:19,451 DEBUG /openCache(), new cache size 86511
DistroCodename: xenial
DistroVariant: ubuntu
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] RV710/M92 [Mobility Radeon HD 4530/4570/545v] [1002:9553] (prog-if 00 [VGA controller])
   Subsystem: Acer Incorporated [ALI] RV710/M92 [Mobility Radeon HD 4530/4570/545v] [1025:0261]
InstallationDate: Installed on 2017-08-24 (424 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
MachineType: Acer Aspire 7735
ProcEnviron:
 LANGUAGE=de_DE
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-36-generic root=UUID=b38cbc2d-42c2-4ab0-a8f7-2d640338a413 ro drm.debug=0xe plymouth:debug vesafb.invalid=1 nopat
SourcePackage: xorg
UpgradeStatus: Upgraded to xenial on 2018-09-12 (40 days ago)
dmi.bios.date: 06/22/2009
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: V1.07
dmi.board.name: JM70
dmi.board.vendor: Acer
dmi.board.version: Rev
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.07:bd06/22/2009:svnAcer:pnAspire7735:pvr0100:rvnAcer:rnJM70:rvrRev:cvnAcer:ct10:cvrN/A:
dmi.product.name: Aspire 7735
dmi.product.version: 0100
dmi.sys.vendor: Acer
version.compiz: compiz 1:0.9.12.3+16.04.20180221-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.91-2~16.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.5-0ubuntu0~16.04.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.5-0ubuntu0~16.04.1
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
xserver.bootTime: Mon Oct 22 18:44:48 2018
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.19.6-1ubuntu4~16.04.1
xserver.video_driver: radeon