上次更新 qt 后，我的 qt 版本之间出现冲突。一部分 qt 库来自 ubuntu Xenial repo，另一部分来自 neon Xenial repo。由于此冲突，我无法再启动 kde。
Ubuntu xenial 似乎使用 qt 5.11.1 和 neon qt 5.11.0。所以我想将所有 qt lib 降级到 5.11.0
提前感谢您提供的任何提示。
dpkg-l：
ii libqt5concurrent5:amd64 5.11.1+dfsg-2+16.04+xenial+build55 amd64 Qt 5 concurrent module
ii libqt5core5a:amd64 5.11.1+dfsg-2+16.04+xenial+build55 amd64 Qt 5 core module
ii libqt5dbus5:amd64 5.11.1+dfsg-2+16.04+xenial+build55 amd64 Qt 5 D-Bus module
ii libqt5designer5:amd64 5.11.1-2+16.04+xenial+build35 amd64 Qt 5 designer module
ii libqt5designercomponents5:amd64 5.11.1-2+16.04+xenial+build35 amd64 Qt 5 Designer components module
ii libqt5gui5:amd64 5.11.1+dfsg-2+16.04+xenial+build55 amd64 Qt 5 GUI module
ii libqt5help5:amd64 5.11.1-2+16.04+xenial+build35 amd64 Qt 5 help module
ii libqt5multimedia5:amd64 5.11.0-0neon+16.04+xenial+build25 amd64 Qt 5 Multimedia module
ii libqt5multimedia5-plugins:amd64 5.11.0-0neon+16.04+xenial+build25 amd64 Qt 5 Multimedia module plugins
ii libqt5multimediagsttools5:amd64 5.11.0-0neon+16.04+xenial+build25 amd64 Qt 5 Multimedia Gst Tools module
ii libqt5multimediaquick5:amd64 5.11.0-0neon+16.04+xenial+build25 amd64 Qt 5 Multimedia Quick module
ii libqt5multimediawidgets5:amd64 5.11.0-0neon+16.04+xenial+build25 amd64 Qt 5 Multimedia Widgets module
ii libqt5network5:amd64 5.11.1+dfsg-2+16.04+xenial+build55 amd64 Qt 5 network module
ii libqt5opengl5:amd64 5.11.1+dfsg-2+16.04+xenial+build55 amd64 Qt 5 OpenGL module
ii libqt5opengl5-dev:amd64 5.11.1+dfsg-2+16.04+xenial+build55 amd64 Qt 5 OpenGL library development files
ii libqt5positioning5:amd64 5.11.1+dfsg-2+16.04+xenial+build35 amd64 Qt Positioning module
ii libqt5printsupport5:amd64 5.11.1+dfsg-2+16.04+xenial+build55 amd64 Qt 5 print support module
ii libqt5qml-graphicaleffects 5.6.1-3ubuntu1~xenialoverlay1~2 all transitional dummy package for Qt 5 Graphical Effects module
ii libqt5qml5:amd64 5.11.1-2+16.04+xenial+build42 amd64 Qt 5 QML module
ii libqt5quick5:amd64 5.11.1-2+16.04+xenial+build42 amd64 Qt 5 Quick library
ii libqt5quickcontrols2-5:amd64 5.11.0-0neon+16.04+xenial+build27 amd64 Qt 5 Quick Controls 2 library
ii libqt5quickparticles5:amd64 5.11.1-2+16.04+xenial+build42 amd64 Qt 5 Quick particles module
ii libqt5quicktemplates2-5:amd64 5.11.0-0neon+16.04+xenial+build27 amd64 Qt 5 Quick Templates 2 library
ii libqt5quicktest5:amd64 5.11.1-2+16.04+xenial+build42 amd64 Qt 5 Quick Test library
ii libqt5quickwidgets5:amd64 5.11.1-2+16.04+xenial+build42 amd64 Qt 5 Quick Widgets library
ii libqt5script5:amd64 5.11.0+dfsg-0neon+16.04+xenial+build31 amd64 Qt 5 script module
ii libqt5scripttools5:amd64 5.11.0+dfsg-0neon+16.04+xenial+build31 amd64 Qt 5 script tools module
ii libqt5sensors5:amd64 5.11.1-2+16.04+xenial+build29 amd64 Qt Sensors module
ii libqt5sql5:amd64 5.11.1+dfsg-2+16.04+xenial+build55 amd64 Qt 5 SQL module
ii libqt5sql5-mysql:amd64 5.11.1+dfsg-2+16.04+xenial+build55 amd64 Qt 5 MySQL database driver
ii libqt5sql5-sqlite:amd64 5.11.1+dfsg-2+16.04+xenial+build55 amd64 Qt 5 SQLite 3 database driver
ii libqt5svg5:amd64 5.11.0-0neon+16.04+xenial+build23 amd64 Qt 5 SVG module
ii libqt5svg5-dev:amd64 5.11.0-0neon+16.04+xenial+build23 amd64 Qt 5 SVG module development files
ii libqt5test5:amd64 5.11.1+dfsg-2+16.04+xenial+build55 amd64 Qt 5 test module
ii libqt5texttospeech5:amd64 5.11.0-0neon+16.04+xenial+build13 amd64 Speech library for Qt - libraries
ii libqt5waylandclient5:amd64 5.11.0-0neon+16.04+xenial+build34 amd64 QtWayland client library
ii libqt5waylandcompositor5:amd64 5.11.0-0neon+16.04+xenial+build34 amd64 QtWayland compositor library
ii libqt5webchannel5:amd64 5.11.1-2+16.04+xenial+build29 amd64 Web communication library for Qt
ii libqt5webengine-data 5.11.0+dfsg-0neon+16.04+xenial+build60 amd64 Web content engine library for Qt - Data
ii libqt5webengine5:amd64 5.11.0+dfsg-0neon+16.04+xenial+build60 amd64 Web content engine library for Qt
ii libqt5webenginecore5:amd64 5.11.0+dfsg-0neon+16.04+xenial+build60 amd64 Web content engine library for Qt - Core
ii libqt5webenginewidgets5:amd64 5.11.0+dfsg-0neon+16.04+xenial+build60 amd64 Web content engine library for Qt - Widget
ii libqt5webkit5:amd64 5.212.0~alpha2-12+16.04+xenial+build36 amd64 Web content engine library for Qt
ii libqt5webkit5-dev:amd64 5.212.0~alpha2-12+16.04+xenial+build36 amd64 Web content engine library for Qt - development files
ii libqt5widgets5:amd64 5.11.1+dfsg-2+16.04+xenial+build55 amd64 Qt 5 widgets module
ii libqt5x11extras5:amd64 5.11.0-0neon+16.04+xenial+build23 amd64 Qt 5 X11 extras
ii libqt5x11extras5-dev:amd64 5.11.0-0neon+16.04+xenial+build23 amd64 Qt 5 X11 extras development files
ii libqt5xml5:amd64 5.11.1+dfsg-2+16.04+xenial+build55 amd64 Qt 5 XML module
ii libqt5xmlpatterns5:amd64 5.11.1-2+16.04+xenial+build32 amd64 Qt 5 XML patterns module
ii libqt5xmlpatterns5-dev:amd64 5.11.1-2+16.04+xenial+build32 amd64 Qt 5 XML patterns development files
inxi-Sxxxr：
System: Host: PDEMU1CML000101 Kernel: 4.8.17-040817-generic x86_64 (64 bit gcc: 6.2.0)
Desktop: Gnome 3.18.5 (Gtk 3.18.9-1ubuntu3.3) info: gnome-shell dm: gdm3 Distro: Ubuntu 16.04 xenial
Repos: Active apt sources in file: /etc/apt/sources.list
deb [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable
deb http://archive.neon.kde.org/release xenial main
Active apt sources in file: /etc/apt/sources.list.d/kubuntu-ppa-ubuntu-backports-xenial.list
deb http://ppa.launchpad.net/kubuntu-ppa/backports/ubuntu xenial main
deb http://de.archive.ubuntu.com/ubuntu/ xenial main contrib universe restricted
deb http://de.archive.ubuntu.com/ubuntu/ xenial-updates main contrib universe restricted
deb http://security.ubuntu.com/ubuntu/ xenial-security main contrib universe restricted
deb http://packages.ros.org.ros.informatik.uni-freiburg.de/ros/ubuntu/ xenial main
deb https://atlassian.artifactoryonline.com/atlassian/hipchat-apt-client xenial main
Active apt sources in file: /etc/apt/sources.list.d/skype-stable.list
deb [arch=amd64] https://repo.skype.com/deb stable main
Active apt sources in file: /etc/apt/sources.list.d/spotify.list
deb http://repository.spotify.com stable non-free
Active apt sources in file: /etc/apt/sources.list.d/steam.list
deb [arch=amd64,i386] http://repo.steampowered.com/steam/ precise steam
deb-src [arch=amd64,i386] http://repo.steampowered.com/steam/ precise steam
Active apt sources in file: /etc/apt/sources.list.d/vscode.list
deb [arch=amd64] http://packages.microsoft.com/repos/vscode stable main