hI upgraded to KDE plasma 5.5.5 following the KDE 4.11 Gentoo wiki page:

sddm works fine, I can start a working openbox session with it. (Yes sddm is in the video group)

However, when I start plasma, I get a dark screen with working a mouse and a limited krunner.

I have an extensive xorg logfile: http://pastebin.com/m0mHVXJq

I extracted some relevant lines from it:

QCoreApplication::arguments: Please instantiate the QApplication object first
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
kscreen: Failed to request backend: unknown error

I use openrc and a Nvidia GeForce GTX 760 with 361.28 driver version with 3 displays but two xscreens.


According to some similar existing bugs on KDE forums, Xinerama can break kde-plasma5, so if you have Xinerama enabled in Xorg's config file (in /etc/X11/xorg.conf ) , try to disable it. It will be in the Section "ServerLayout" :

Option "Xinerama" "1"

So if you have the line like above, change the value to zero:

Option "Xinerama" "0"

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.