The following issue with qt5 occurs in ubuntu 18.04
reinstall of libraries and soft have no effect
marvin@X1-18:~$ texmaker
This application failed to start because it could not find or load the Qt platform plugin "xcb"
in "".
Available platform plugins are: dxcb, eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, xcb.
Reinstalling the application may fix this problem.
Aborted (core dumped)
marvin@X1-18:~$ texstudio
This application failed to start because it could not find or load the Qt platform plugin "xcb"
in "".
Available platform plugins are: dxcb, eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, xcb.
Reinstalling the application may fix this problem.
Aborted (core dumped)
However, the libraries are linked correctly:
marvin@X1-18:~$ ldd /usr/bin/texstudio
linux-vdso.so.1 (0x00007fffe6f76000)
libX11.so.6 => /usr/lib/x86_64-linux-gnu/libX11.so.6 (0x00007fb5a714c000)
libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007fb5a6f2f000)
libpoppler-qt5.so.1 => /usr/lib/x86_64-linux-gnu/libpoppler-qt5.so.1 (0x00007fb5a6cb6000)
libQt5PrintSupport.so.5 => /usr/lib/x86_64-linux-gnu/libQt5PrintSupport.so.5 (0x00007fb5a6a47000)
libQt5Widgets.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5 (0x00007fb5a6200000)
libQt5Gui.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 (0x00007fb5a5a97000)
libQt5Network.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Network.so.5 (0x00007fb5a570b000)
libQt5Xml.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Xml.so.5 (0x00007fb5a54cf000)
libQt5Script.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Script.so.5 (0x00007fb5a5039000)
libQt5Core.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 (0x00007fb5a48ee000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007fb5a46cf000)
libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007fb5a4341000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fb5a3fa3000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007fb5a3d8b000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fb5a399a000)
libxcb.so.1 => /usr/lib/x86_64-linux-gnu/libxcb.so.1 (0x00007fb5a3772000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fb5a356e000)
libpoppler.so.73 => /usr/lib/x86_64-linux-gnu/libpoppler.so.73 (0x00007fb5a30da000)
libGL.so.1 => /usr/lib/x86_64-linux-gnu/libGL.so.1 (0x00007fb5a2e4e000)
libpng16.so.16 => /usr/lib/x86_64-linux-gnu/libpng16.so.16 (0x00007fb5a2c1c000)
libharfbuzz.so.0 => /usr/lib/x86_64-linux-gnu/libharfbuzz.so.0 (0x00007fb5a297e000)
libicui18n.so.60 => /usr/lib/x86_64-linux-gnu/libicui18n.so.60 (0x00007fb5a24dd000)
libicuuc.so.60 => /usr/lib/x86_64-linux-gnu/libicuuc.so.60 (0x00007fb5a2126000)
libdouble-conversion.so.1 => /usr/lib/x86_64-linux-gnu/libdouble-conversion.so.1 (0x00007fb5a1f15000)
libglib-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007fb5a1bff000)
/lib64/ld-linux-x86-64.so.2 (0x00007fb5a836e000)
libXau.so.6 => /usr/lib/x86_64-linux-gnu/libXau.so.6 (0x00007fb5a19fb000)
libXdmcp.so.6 => /usr/lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007fb5a17f5000)
libfreetype.so.6 => /usr/lib/x86_64-linux-gnu/libfreetype.so.6 (0x00007fb5a1541000)
libfontconfig.so.1 => /usr/lib/x86_64-linux-gnu/libfontconfig.so.1 (0x00007fb5a12fc000)
libjpeg.so.8 => /usr/lib/x86_64-linux-gnu/libjpeg.so.8 (0x00007fb5a1094000)
libnss3.so => /usr/lib/x86_64-linux-gnu/libnss3.so (0x00007fb5a0d50000)
libsmime3.so => /usr/lib/x86_64-linux-gnu/libsmime3.so (0x00007fb5a0b24000)
libnspr4.so => /usr/lib/x86_64-linux-gnu/libnspr4.so (0x00007fb5a08e7000)
liblcms2.so.2 => /usr/lib/x86_64-linux-gnu/liblcms2.so.2 (0x00007fb5a068f000)
libtiff.so.5 => /usr/lib/x86_64-linux-gnu/libtiff.so.5 (0x00007fb5a0418000)
libGLX.so.0 => /usr/lib/x86_64-linux-gnu/libGLX.so.0 (0x00007fb5a01e7000)
libGLdispatch.so.0 => /usr/lib/x86_64-linux-gnu/libGLdispatch.so.0 (0x00007fb59ff31000)
libgraphite2.so.3 => /usr/lib/x86_64-linux-gnu/libgraphite2.so.3 (0x00007fb59fd04000)
libicudata.so.60 => /usr/lib/x86_64-linux-gnu/libicudata.so.60 (0x00007fb59e15b000)
libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007fb59dee9000)
libbsd.so.0 => /lib/x86_64-linux-gnu/libbsd.so.0 (0x00007fb59dcd4000)
libexpat.so.1 => /lib/x86_64-linux-gnu/libexpat.so.1 (0x00007fb59daa2000)
libnssutil3.so => /usr/lib/x86_64-linux-gnu/libnssutil3.so (0x00007fb59d873000)
libplc4.so => /usr/lib/x86_64-linux-gnu/libplc4.so (0x00007fb59d66e000)
libplds4.so => /usr/lib/x86_64-linux-gnu/libplds4.so (0x00007fb59d46a000)
librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007fb59d262000)
liblzma.so.5 => /lib/x86_64-linux-gnu/liblzma.so.5 (0x00007fb59d03c000)
libjbig.so.0 => /usr/lib/x86_64-linux-gnu/libjbig.so.0 (0x00007fb59ce2e000)
marvin@X1-18:~$ ldd /usr/bin/texmaker
linux-vdso.so.1 (0x00007fff45db5000)
libsynctex.so.1 => /usr/lib/x86_64-linux-gnu/libsynctex.so.1 (0x00007f5f435f4000)
libQt5PrintSupport.so.5 => /usr/lib/x86_64-linux-gnu/libQt5PrintSupport.so.5 (0x00007f5f43385000)
libQt5Widgets.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5 (0x00007f5f42b3e000)
libQt5Gui.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 (0x00007f5f423d5000)
libQt5Xml.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Xml.so.5 (0x00007f5f42199000)
libQt5Network.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Network.so.5 (0x00007f5f41e0d000)
libQt5Script.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Script.so.5 (0x00007f5f41977000)
libQt5Core.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 (0x00007f5f4122c000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f5f4100d000)
libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f5f40c7f000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f5f408e1000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f5f404f0000)
libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f5f402d3000)
libGL.so.1 => /usr/lib/x86_64-linux-gnu/libGL.so.1 (0x00007f5f40047000)
libpng16.so.16 => /usr/lib/x86_64-linux-gnu/libpng16.so.16 (0x00007f5f3fe15000)
libharfbuzz.so.0 => /usr/lib/x86_64-linux-gnu/libharfbuzz.so.0 (0x00007f5f3fb77000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f5f3f95f000)
libicui18n.so.60 => /usr/lib/x86_64-linux-gnu/libicui18n.so.60 (0x00007f5f3f4be000)
libicuuc.so.60 => /usr/lib/x86_64-linux-gnu/libicuuc.so.60 (0x00007f5f3f107000)
libdouble-conversion.so.1 => /usr/lib/x86_64-linux-gnu/libdouble-conversion.so.1 (0x00007f5f3eef6000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f5f3ecf2000)
libglib-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f5f3e9dc000)
/lib64/ld-linux-x86-64.so.2 (0x00007f5f443d9000)
libGLX.so.0 => /usr/lib/x86_64-linux-gnu/libGLX.so.0 (0x00007f5f3e7ab000)
libGLdispatch.so.0 => /usr/lib/x86_64-linux-gnu/libGLdispatch.so.0 (0x00007f5f3e4f5000)
libfreetype.so.6 => /usr/lib/x86_64-linux-gnu/libfreetype.so.6 (0x00007f5f3e241000)
libgraphite2.so.3 => /usr/lib/x86_64-linux-gnu/libgraphite2.so.3 (0x00007f5f3e014000)
libicudata.so.60 => /usr/lib/x86_64-linux-gnu/libicudata.so.60 (0x00007f5f3c46b000)
libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f5f3c1f9000)
libX11.so.6 => /usr/lib/x86_64-linux-gnu/libX11.so.6 (0x00007f5f3bec0000)
libxcb.so.1 => /usr/lib/x86_64-linux-gnu/libxcb.so.1 (0x00007f5f3bc98000)
libXau.so.6 => /usr/lib/x86_64-linux-gnu/libXau.so.6 (0x00007f5f3ba94000)
libXdmcp.so.6 => /usr/lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007f5f3b88e000)
libbsd.so.0 => /lib/x86_64-linux-gnu/libbsd.so.0 (0x00007f5f3b679000)
librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f5f3b471000)
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: qt5dxcb-plugin 1.1.8.4+ds-1build1
ProcVersionSignature: Ubuntu 4.15.0-29.31-generic 4.15.18
Uname: Linux 4.15.0-29-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon Aug 13 12:28:21 2018
SourcePackage: deepin-qt5dxcb-plugin
UpgradeStatus: No upgrade log present (probably fresh install)
https:/ /packages. debian. org/sid/ amd64/qt5dxcb- plugin/ filelist
/usr/lib/ x86_64- linux-gnu/ qt5/plugins/ platforms/ libdxcb. so
I can't see any relations or occurance of "libdxcb" from the log attached. Does removing "qt5dxcb-plugin" solve this problem?