Hello I've just crossgraded my desktop computer from i386 to amd64, using the wiki recipe and got everything working so far.
The only problem: On the lower right corner I have to white/red "do not enter road sign icons" where "Notifications", "System Tray" and the icons of minimized music players etc used to be. Also when clicking on the "bean" icon and "+ Add Widgets", I get a completely empty selection. In my ~/.xsession-errors I spot a couple of relating messages: plasma-desktop(11613)/libplasma Plasma::DeclarativeWidgetPrivate::errorPrint: "file:///usr/share/kde4/apps/plasma/packages/org.kde.desktop.widgetexplorer/contents/ui/main.qml Error loading QML file. 21: plugin cannot be loaded for module "org.kde.plasma.components": The file '/usr/lib/kde4/imports/org/kde/plasma/components/libplasmacomponentsplugin.so' is not a valid Qt plugin. " QDeclarativeComponent: Component is not ready ... plasma-desktop(11613)/plasma StatusNotifierItemSource::refreshCallback: DBusMenu disabled for this application file:///usr/share/kde4/apps/plasma/packages/org.kde.plasma.tasks/contents/ui/Task.qml:276: Error: Qt.createQmlObject() failed to create object: file:///usr/share/kde4/apps/plasma/packages/org.kde.plasma.tasks/contents/ui/inline:1:1: plugin cannot be loaded for module "org.kde.plasma.components": The file '/usr/lib/kde4/imports/org/kde/plasma/components/libplasmacomponentsplugin.so' is not a valid Qt plugin. QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave. I already * stopped KDM * purged every package from architecture i386 * purged every QT, KDE, KDM related package * made sure that /usr/lib/kde4 was empty * moved away ~/.local and ~/.kde * reinstalled "kde-plasma-desktop" * restarted KDM But the problem persists. The shared library is there and looks ok, i.e. with no missing linker dependencies: $ file /usr/lib/kde4/imports/org/kde/plasma/components/libplasmacomponentsplugin.so /usr/lib/kde4/imports/org/kde/plasma/components/libplasmacomponentsplugin.so: ELF 64-bit LSB shared object, x86-64, version 1 (GNU/Linux), dynamically linked, BuildID [sha1]=c3170e3aa2792174d2b8642f4353076cf1d200c4, stripped $ ls -al /usr/lib/kde4/imports/org/kde/plasma/components/libplasmacomponentsplugin.so -rwxr-xr-x 1 root root 130632 Dez 10 2014 /usr/lib/kde4/imports/org/kde/plasma/components/libplasmacomponentsplugin.so $ md5sum /usr/lib/kde4/imports/org/kde/plasma/components/libplasmacomponentsplugin.so f71372eee1d19cd9b950086a617a5152 /usr/lib/kde4/imports/org/kde/plasma/components/libplasmacomponentsplugin.so $ ldd /usr/lib/kde4/imports/org/kde/plasma/components/libplasmacomponentsplugin.so linux-vdso.so.1 (0x00007ffc4c741000) libQtCore.so.4 => /usr/lib/x86_64-linux-gnu/libQtCore.so.4 (0x00007ff2e839d000) libQtDeclarative.so.4 => /usr/lib/x86_64-linux-gnu/libQtDeclarative.so.4 (0x00007ff2e7de5000) libQtGui.so.4 => /usr/lib/x86_64-linux-gnu/libQtGui.so.4 (0x00007ff2e70f5000) libkdeui.so.5 => /usr/lib/libkdeui.so.5 (0x00007ff2e6a5e000) libkdeclarative.so.5 => /usr/lib/libkdeclarative.so.5 (0x00007ff2e684e000) libplasma.so.3 => /usr/lib/libplasma.so.3 (0x00007ff2e632a000) libkdecore.so.5 => /usr/lib/libkdecore.so.5 (0x00007ff2e5e3b000) libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007ff2e5b30000) libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007ff2e582f000) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007ff2e5486000) libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007ff2e5269000) libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007ff2e504e000) libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007ff2e4e4a000) libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007ff2e4b3b000) librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007ff2e4933000) libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007ff2e471d000) /lib64/ld-linux-x86-64.so.2 (0x00007ff2e8aac000) libQtScript.so.4 => /usr/lib/x86_64-linux-gnu/libQtScript.so.4 (0x00007ff2e426a000) libQtSql.so.4 => /usr/lib/x86_64-linux-gnu/libQtSql.so.4 (0x00007ff2e4029000) libQtXmlPatterns.so.4 => /usr/lib/x86_64-linux-gnu/libQtXmlPatterns.so.4 (0x00007ff2e39d2000) libQtNetwork.so.4 => /usr/lib/x86_64-linux-gnu/libQtNetwork.so.4 (0x00007ff2e3681000) libfontconfig.so.1 => /usr/lib/x86_64-linux-gnu/libfontconfig.so.1 (0x00007ff2e3444000) libaudio.so.2 => /usr/lib/x86_64-linux-gnu/libaudio.so.2 (0x00007ff2e322a000) libpng12.so.0 => /lib/x86_64-linux-gnu/libpng12.so.0 (0x00007ff2e3003000) libfreetype.so.6 => /usr/lib/x86_64-linux-gnu/libfreetype.so.6 (0x00007ff2e2d59000) libgobject-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 (0x00007ff2e2b07000) libSM.so.6 => /usr/lib/x86_64-linux-gnu/libSM.so.6 (0x00007ff2e28ff000) libICE.so.6 => /usr/lib/x86_64-linux-gnu/libICE.so.6 (0x00007ff2e26e2000) libXrender.so.1 => /usr/lib/x86_64-linux-gnu/libXrender.so.1 (0x00007ff2e24d8000) libXext.so.6 => /usr/lib/x86_64-linux-gnu/libXext.so.6 (0x00007ff2e22c6000) libX11.so.6 => /usr/lib/x86_64-linux-gnu/libX11.so.6 (0x00007ff2e1f83000) libQtXml.so.4 => /usr/lib/x86_64-linux-gnu/libQtXml.so.4 (0x00007ff2e1d3c000) libattica.so.0.4 => /usr/lib/x86_64-linux-gnu/libattica.so.0.4 (0x00007ff2e1a53000) libQtSvg.so.4 => /usr/lib/x86_64-linux-gnu/libQtSvg.so.4 (0x00007ff2e17fb000) libdbusmenu-qt.so.2 => /usr/lib/x86_64-linux-gnu/libdbusmenu-qt.so.2 (0x00007ff2e15c8000) libXfixes.so.3 => /usr/lib/x86_64-linux-gnu/libXfixes.so.3 (0x00007ff2e13c2000) libQtDBus.so.4 => /usr/lib/x86_64-linux-gnu/libQtDBus.so.4 (0x00007ff2e1145000) libQtWebKit.so.4 => /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4 (0x00007ff2dec65000) libkdnssd.so.4 => /usr/lib/libkdnssd.so.4 (0x00007ff2dea3b000) libthreadweaver.so.4 => /usr/lib/libthreadweaver.so.4 (0x00007ff2de822000) libkio.so.5 => /usr/lib/libkio.so.5 (0x00007ff2de345000) libkdewebkit.so.5 => /usr/lib/libkdewebkit.so.5 (0x00007ff2de11f000) libknewstuff3.so.4 => /usr/lib/libknewstuff3.so.4 (0x00007ff2ddea2000) libsolid.so.4 => /usr/lib/libsolid.so.4 (0x00007ff2ddb9a000) libqca.so.2 => /usr/lib/x86_64-linux-gnu/libqca.so.2 (0x00007ff2dd899000) libphonon.so.4 => /usr/lib/x86_64-linux-gnu/libphonon.so.4 (0x00007ff2dd61b000) libQtOpenGL.so.4 => /usr/lib/x86_64-linux-gnu/libQtOpenGL.so.4 (0x00007ff2dd319000) libkcmutils.so.4 => /usr/lib/libkcmutils.so.4 (0x00007ff2dd0d6000) libbz2.so.1.0 => /lib/x86_64-linux-gnu/libbz2.so.1.0 (0x00007ff2dcec6000) liblzma.so.5 => /lib/x86_64-linux-gnu/liblzma.so.5 (0x00007ff2dcca3000) libdlrestrictions.so.1 => /usr/lib/libdlrestrictions.so.1 (0x00007ff2dca9e000) libfam.so.0 => /usr/lib/libfam.so.0 (0x00007ff2dc895000) libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007ff2dc627000) libexpat.so.1 => /lib/x86_64-linux-gnu/libexpat.so.1 (0x00007ff2dc3fe000) libXt.so.6 => /usr/lib/x86_64-linux-gnu/libXt.so.6 (0x00007ff2dc195000) libXau.so.6 => /usr/lib/x86_64-linux-gnu/libXau.so.6 (0x00007ff2dbf91000) libffi.so.6 => /usr/lib/x86_64-linux-gnu/libffi.so.6 (0x00007ff2dbd89000) libuuid.so.1 => /lib/x86_64-linux-gnu/libuuid.so.1 (0x00007ff2dbb84000) libxcb.so.1 => /usr/lib/x86_64-linux-gnu/libxcb.so.1 (0x00007ff2db962000) libdbus-1.so.3 => /lib/x86_64-linux-gnu/libdbus-1.so.3 (0x00007ff2db71a000) libjpeg.so.62 => /usr/lib/x86_64-linux-gnu/libjpeg.so.62 (0x00007ff2db4c3000) libgstapp-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstapp-1.0.so.0 (0x00007ff2db2b6000) libgstpbutils-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstpbutils-1.0.so.0 (0x00007ff2db08d000) libgstvideo-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstvideo-1.0.so.0 (0x00007ff2dae40000) libgstaudio-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstaudio-1.0.so.0 (0x00007ff2dabf1000) libgstbase-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstbase-1.0.so.0 (0x00007ff2da992000) libgstreamer-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0 (0x00007ff2da681000) libsqlite3.so.0 => /usr/lib/x86_64-linux-gnu/libsqlite3.so.0 (0x00007ff2da3b8000) libGL.so.1 => /usr/lib/x86_64-linux-gnu/libGL.so.1 (0x00007ff2da06c000) libnepomuk.so.4 => /usr/lib/libnepomuk.so.4 (0x00007ff2d9d99000) libstreamanalyzer.so.0 => /usr/lib/libstreamanalyzer.so.0 (0x00007ff2d9b15000) libacl.so.1 => /lib/x86_64-linux-gnu/libacl.so.1 (0x00007ff2d990c000) libattr.so.1 => /lib/x86_64-linux-gnu/libattr.so.1 (0x00007ff2d9707000) libkparts.so.4 => /usr/lib/libkparts.so.4 (0x00007ff2d94ac000) libudev.so.1 => /lib/x86_64-linux-gnu/libudev.so.1 (0x00007ff2d929d000) libpulse.so.0 => /usr/lib/x86_64-linux-gnu/libpulse.so.0 (0x00007ff2d904c000) libpulse-mainloop-glib.so.0 => /usr/lib/x86_64-linux-gnu/libpulse-mainloop-glib.so.0 (0x00007ff2d8e47000) libXdmcp.so.6 => /usr/lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007ff2d8c42000) liborc-0.4.so.0 => /usr/lib/x86_64-linux-gnu/liborc-0.4.so.0 (0x00007ff2d89be000) libgsttag-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgsttag-1.0.so.0 (0x00007ff2d8783000) libgmodule-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgmodule-2.0.so.0 (0x00007ff2d857f000) libnvidia-tls.so.340.65 => /usr/lib/x86_64-linux-gnu/tls/libnvidia-tls.so.340.65 (0x00007ff2d837c000) libnvidia-glcore.so.340.65 => /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.340.65 (0x00007ff2d5768000) libsoprano.so.4 => /usr/lib/libsoprano.so.4 (0x00007ff2d547a000) libstreams.so.0 => /usr/lib/libstreams.so.0 (0x00007ff2d523f000) libxml2.so.2 => /usr/lib/x86_64-linux-gnu/libxml2.so.2 (0x00007ff2d4ed8000) libnepomukutils.so.4 => /usr/lib/libnepomukutils.so.4 (0x00007ff2d4c98000) libjson-c.so.2 => /lib/x86_64-linux-gnu/libjson-c.so.2 (0x00007ff2d4a8d000) libpulsecommon-5.0.so => /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-5.0.so (0x00007ff2d4813000) libcap.so.2 => /lib/x86_64-linux-gnu/libcap.so.2 (0x00007ff2d460e000) libnepomukquery.so.4 => /usr/lib/libnepomukquery.so.4 (0x00007ff2d43c2000) libX11-xcb.so.1 => /usr/lib/x86_64-linux-gnu/libX11-xcb.so.1 (0x00007ff2d41c0000) libXtst.so.6 => /usr/lib/x86_64-linux-gnu/libXtst.so.6 (0x00007ff2d3fba000) libsystemd.so.0 => /lib/x86_64-linux-gnu/libsystemd.so.0 (0x00007ff2d3d96000) libwrap.so.0 => /lib/x86_64-linux-gnu/libwrap.so.0 (0x00007ff2d3b8b000) libsndfile.so.1 => /usr/lib/x86_64-linux-gnu/libsndfile.so.1 (0x00007ff2d3921000) libasyncns.so.0 => /usr/lib/x86_64-linux-gnu/libasyncns.so.0 (0x00007ff2d371b000) libXi.so.6 => /usr/lib/x86_64-linux-gnu/libXi.so.6 (0x00007ff2d350b000) libgcrypt.so.20 => /lib/x86_64-linux-gnu/libgcrypt.so.20 (0x00007ff2d3229000) libresolv.so.2 => /lib/x86_64-linux-gnu/libresolv.so.2 (0x00007ff2d3012000) libnsl.so.1 => /lib/x86_64-linux-gnu/libnsl.so.1 (0x00007ff2d2dfa000) libFLAC.so.8 => /usr/lib/x86_64-linux-gnu/libFLAC.so.8 (0x00007ff2d2bc7000) libvorbisenc.so.2 => /usr/lib/x86_64-linux-gnu/libvorbisenc.so.2 (0x00007ff2d2914000) libgpg-error.so.0 => /lib/x86_64-linux-gnu/libgpg-error.so.0 (0x00007ff2d2702000) libogg.so.0 => /usr/lib/x86_64-linux-gnu/libogg.so.0 (0x00007ff2d24f9000) libvorbis.so.0 => /usr/lib/x86_64-linux-gnu/libvorbis.so.0 (0x00007ff2d22cc000) I know that crossgrading is totally unsupported etc. pp. but maybe someone with KDE developing skills could give me a hint what could cause this error :) best regards -christian-