As soon as I load kdm, i get a message in kdm.log of klauncher(18345) kdemain: No DBUS session-bus found. Check if you have started the DBUS server. kdeinit4: Communication error with launcher. Exiting! kdmgreet(18337)/kdecore (K*TimeZone*): KSystemTimeZones: ktimezoned initialize() D-Bus call failed: "Not connected to D-Bus server" kdmgreet(18337)/kdecore (K*TimeZone*): No time zone information obtained from ktimezoned kdmgreet: Fatal IO error: client killed using visual class 4, id 108 Server terminated successfully (0). Closing log file. As soon as I load kdm, this is added to my kdm.log and kdm closes. Reproducible: Always Steps to Reproduce: 1.I installed a few widgets... i can't remember their exact names, but something like veromix and a plasma shell widget (when i one of them onto the desktop, it displayed a python error) 2. 3. Actual Results: After i rebooted, I got the error. Expected Results: Should open kdm with login manager
> kdmgreet: Fatal IO error: client killed Doesn't look like a kdm bug, but kdm maintainers know better.
please state the kde version you are using. the error messages about d-bus failures do not seem to be causally related to the abnormal termination of kdmgreet (i have them, too). as the message at the top of kdm.log says, you need to look into syslog to find any actually relevant messages. the kdm README contains more information how to obtain more useful logs (you may need -debug 15, but that's speculative at this point).
I have the same "No DBUS session-bus found"-message in kdm.log. But only at the second login. KDM loads until the hd-icon is visible. In /var/log/messages: kernel: [ 3183.351659] colord-sane[14934]: segfault at 4 ip b5637472 sp b560afb8 error 6 in libdbus-1.so.3.7.2[b560c000+49000] KDE 4.8
KDM is unmaintained and not used in KDE Plasma 5. SDDM is the login manager used in KDE Plasma 5. If you still have this same issue with SDDM, please file an issue on the SDDM bugtracker (after doing a search for existing issues first!): https://github.com/sddm/sddm/issues/