Description of problem:
Since I updated from plasma 5.4.2 to 5.4.3 yesterday (and naively
implemented todays kde updates from 15.04.2 to 15.04.3) the whole
KDE is a mess. The dnf undo fails with "No package xxx available".

To get to a console, I have to go through ctrl-alt-F2. Switching on
a password protected WiFi doesn't work, because the password is
in the Wallet which doesn't get used anymore. To get halfway normal
KDE interface I have to log out and log in again, because the first login
after the reboot brings up an empty background with the message
"Could not start process. Cannot talk to klauncher: Not connected
to D-bus server."

The specific problem contained in this report "just comes up",
I do not really know which interaction caused it.

Version-Release number of selected component:
kf5-kded-5.15.0-1.fc22

Additional info:
reporter:       libreport-2.6.3
backtrace_rating: 4
cmdline:        /usr/bin/kded5
crash_function: XGetXCBConnection
executable:     /usr/bin/kded5
global_pid:     8517
kernel:         4.2.5-201.fc22.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 XGetXCBConnection at x11_xcb.c:9
 #1 XlibBackend::initialize at ../../../../kcms/touchpad/src/backends/x11/xlibbackend.cpp:327
 #2 TouchpadBackend::implementation at ../../../../kcms/touchpad/src/touchpadbackend.cpp:37
 #3 TouchpadDisabler::TouchpadDisabler at ../../../../kcms/touchpad/src/kded/kded.cpp:44
 #4 KPluginFactory::createInstance<TouchpadDisabler, QObject> at /usr/include/KF5/KCoreAddons/kpluginfactory.h:477
 #5 KPluginFactory::create at ../../../src/lib/plugin/kpluginfactory.cpp:145
 #6 create<KDEDModule> at /usr/include/KF5/KCoreAddons/kpluginfactory.h:495
 #7 Kded::loadModule at ../../src/kded.cpp:383
 #8 Kded::initModules at ../../src/kded.cpp:246
 #9 recreateDone at ../../src/kded.cpp:536