Hi, I have downgraded all packages to `testing` and checked integrity of all packages and there are only modified unrelated configurations:
$ dpkg -V ??5?????? c /etc/apache2/mods-available/ident.load ??5?????? c /etc/bash.bashrc ??5?????? c /etc/default/cups ??5?????? c /etc/default/hdapsd ??5?????? c /etc/sane.d/dll.conf ??5?????? c /etc/mysql/my.cnf the problem remains exactly same. New xsession-error attached. -- Package Satus: Package: plasma-desktop Status: install ok installed Priority: optional Section: kde Installed-Size: 7816 Maintainer: Debian/Kubuntu Qt/KDE Maintainers < debian-qt-kde@lists.debian.org> Architecture: amd64 Version: 4:5.3.2-2 Depends: ii breeze 4:5.3.2-4+b1 ii kactivities 5.12.0-2 ii kde-cli-tools 4:5.3.2-2 ii kded5 5.12.0-1 ii libc6 2.19-19 ii libcanberra0 0.30-2.1 ii libfontconfig1 2.11.0-6.3 ii libgcc1 1:5.1.1-14 ii libkf5activities5 5.12.0-2 ii libkf5activitiesexperimentalstats1 4:5.3.2-2 ii libkf5archive5 5.13.0-1 ii libkf5auth5 5.12.0-1 ii libkf5baloo1 5.9.2-3 ii libkf5bookmarks5 5.12.0-1 ii libkf5codecs5 5.13.0-1 ii libkf5completion5 5.12.0-1 ii libkf5configcore5 5.13.0-1 ii libkf5configgui5 5.13.0-1 ii libkf5configwidgets5 5.12.0-1 ii libkf5coreaddons5 5.13.0-1 ii libkf5dbusaddons5 5.13.0-1 ii libkf5emoticons5 5.12.0-1 ii libkf5globalaccel5 5.12.0-1 ii libkf5guiaddons5 5.13.0-1 ii libkf5i18n5 5.13.0-1 ii libkf5iconthemes5 5.12.0-1 ii libkf5itemviews5 5.13.0-1 ii libkf5jobwidgets5 5.12.0-1 ii libkf5kcmutils5 5.12.0-1 ii libkf5kdelibs4support5 5.12.0-2 ii libkf5kiocore5 5.12.0-1 ii libkf5kiofilewidgets5 5.12.0-1 ii libkf5kiowidgets5 5.12.0-1 ii libkf5newstuff5 5.12.0-1 ii libkf5notifications5 5.12.0-1 ii libkf5notifyconfig5 5.12.0-1 ii libkf5parts5 5.12.0-1 ii libkf5people5 5.12.0-1 ii libkf5peoplewidgets5 5.12.0-1 ii libkf5plasma5 5.12.0-1 ii libkf5plasmaquick5 5.12.0-1 ii libkf5quickaddons5 5.12.0-2 ii libkf5runner5 5.12.0-1 ii libkf5service5 5.12.0-1 ii libkf5solid5 5.13.0-1 ii libkf5sonnetui5 5.13.0-1 ii libkf5wallet5 5.12.0-1 ii libkf5widgetsaddons5 5.13.0-1 ii libkf5windowsystem5 5.13.0-3 ii libkf5xmlgui5 5.12.0-1 ii libkfontinst5 4:5.3.2-2 ii libkfontinstui5 4:5.3.2-2 ii libkworkspace5-5 4:5.3.2-4 ii libphonon4qt5-4 4:4.8.3-2 ii libpulse-mainloop-glib0 6.0-5 ii libpulse0 6.0-5 ii libqt5concurrent5 5.4.2+dfsg-5 ii libqt5core5a 5.4.2+dfsg-5 ii libqt5dbus5 5.4.2+dfsg-5 ii libqt5gui5 5.4.2+dfsg-5 ii libqt5network5 5.4.2+dfsg-5 ii libqt5printsupport5 5.4.2+dfsg-5 ii libqt5qml5 5.4.2-4 ii libqt5quick5 5.4.2-4 ii libqt5svg5 5.4.2-3 ii libqt5widgets5 5.4.2+dfsg-5 ii libqt5x11extras5 5.4.2-2+b1 ii libqt5xml5 5.4.2+dfsg-5 ii libstdc++6 5.1.1-14 ii libtaskmanager5 4:5.3.2-4 ii libusb-0.1-4 2:0.1.12-25 ii libx11-6 2:1.6.3-1 ii libx11-xcb1 2:1.6.3-1 ii libxcb-record0 1.10-3+b1 ii libxcb-xkb1 1.10-3+b1 ii libxcb1 1.10-3+b1 ii libxcursor1 1:1.1.14-1+b1 ii libxfixes3 1:5.0.1-2+b2 ii libxi6 2:1.7.4-1+b2 ii libxkbfile1 1:1.0.8-1 ii oxygen-sounds 4:5.3.2-3 ii plasma-desktop-data 4:5.3.2-2 ii plasma-framework 5.12.0-1 ii plasma-workspace 4:5.3.2-4 ii polkit-kde-agent-1 4:5.3.2-1 ii qml-module-org-kde-kwindowsystem 5.12.0-2 ii qml-module-org-kde-solid 5.13.0-1 ii qtdeclarative5-kf5declarative 5.12.0-2 Recommends: ii bluedevil 4:5.3.2-1 ii fonts-oxygen 4:5.3.2-2 ii kde-config-gtk-style 4:5.3.2-1 ii kde-config-sddm 4:5.3.2-1 ii kde-style-oxygen-qt5 4:5.3.2-3+b1 ii khelpcenter 4:5.3.2-2 ii khotkeys 4:5.3.2-2 ii kinfocenter 4:5.3.2-2 ii kio-extras 4:5.3.2-2 ii kmenuedit 4:5.3.2-1 ii kscreen 4:5.3.2-4 ii ksshaskpass 4:5.3.2-1 ii ksysguard 4:5.3.2-2 un kwin <none> ii kwrited 4:5.3.2-1 ii muon-discover 4:5.3.2-3 ii muon-notifier 4:5.3.2-3 ii muon-updater 4:5.3.2-3 ii powerdevil 4:5.3.2-1 un sni-qt <none> ii systemsettings 4:5.3.2-2 ii user-manager 4:5.1.95-1
xsession-errors
Description: Binary data
