Hi,
Is it a know problem that Xfce4 (looks like panel dbus issues) is not working anymore with (at least) the F29 5.2.7 kernel?
I upgraded (a.o.) 5.1.21-200 to 5.2.7-100 kernel and rebooted and Xfce4 is not working anymore (no panel, no apps started). Rebooting again from 5.1.21-200 kernel and it works again. After that I switched kernel 2 times and it is fully reproducable: 5.1.21-200 works, 5.2.7-100 does not work.