I run virtualbox in KDE environment. A while ago (can't say exactly when) I started to have a problem where any file opening dialog would fail with this message: "Cannot talk to klauncher: Not connected to D-Bus server"
I found that setting KDE_FORK_SLAVES=1 in environment works around the problem. In the unsuccessful case I the following messages: kdeinit4: Shutting down running client. klauncher: Exiting on signal 15 Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString) QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave. KDE Daemon (kded) already running. QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave. kbuildsycoca4 running... ... kdeinit4: Shutting down running client. klauncher: Exiting on signal 15 Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString) QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave. KDE Daemon (kded) already running. QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave. kbuildsycoca4 running... ... kdeinit4: Shutting down running client. klauncher: Exiting on signal 15 Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString) QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave. KDE Daemon (kded) already running. QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave. kbuildsycoca4 running... ... klauncher: Not connected to D-Bus server" kdeinit4: Shutting down running client. klauncher: Exiting on signal 15 Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString) QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave. KDE Daemon (kded) already running. QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave. kbuildsycoca4 running... ... kdeinit4: Shutting down running client. klauncher: Exiting on signal 15 Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString) QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave. KDE Daemon (kded) already running. QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave. kbuildsycoca4 running... ... Qt CRITICAL: startkdeinitlock(18915): couldn't create slave: "Cannot talk to klauncher: Not connected to D-Bus server" kdeinit4: Shutting down running client. klauncher: Exiting on signal 15 Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString) QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave. KDE Daemon (kded) already running. QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave. kbuildsycoca4 running... ... kdeinit4: Shutting down running client. klauncher: Exiting on signal 15 Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString) QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave. KDE Daemon (kded) already running. QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave. kbuildsycoca4 running... ... Qt CRITICAL: startkdeinitlock(18915): couldn't create slave: "Cannot talk to klauncher: Not connected to D-Bus server" kdeinit4: Shutting down running client. klauncher: Exiting on signal 15 Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString) QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave. KDE Daemon (kded) already running. QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave. kbuildsycoca4 running... ... Qt CRITICAL: startkdeinitlock(18915): Couldn't start knotify from knotify4.desktop: "KLauncher could not be reached via D-Bus. Error when calling start_service_by_desktop_path: Not connected to D-Bus server " This is an output from a single attempt to open a file open dialog. Now the same for the successful case: kdeinit4: Shutting down running client. klauncher: Exiting on signal 15 Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString) QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave. KDE Daemon (kded) already running. QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave. kbuildsycoca4 running... ... kdeinit4: Shutting down running client. klauncher: Exiting on signal 15 Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString) QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave. KDE Daemon (kded) already running. QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave. kbuildsycoca4 running... ... Qt CRITICAL: startkdeinitlock(19475)/kdecore (K*TimeZone*): KSystemTimeZones: ktimezoned initialize() D-Bus call failed: "Not connected to D-Bus server" I would appreciate any pointers on debugging this. -- Andriy Gapon
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