Comment 8 for bug 710711

It seems normal without looking at your config that NM sets the IP to 10.42.43.x, which is used for internet connection sharing (see the connection's settings, under IPv4 or IPv6 tab). You can disable this by running nm-connection-editor manually if you can't access nm-applet.

But now, from our discussion it seems nm-applet is running but not shows in indicator-applet? Could you verify that indicator-applet is indeed added to the panel if you're in a classic GNOME session?

I'd be curious to see if NM is running at the time too; the last logs you added don't indicate any kind of crash. I'm more and more suspecting that this particular crash shows up whenever you restart your computer, and actually caused by NM failing to assert the presence of the dbus bus on shutdown (maybe it gets stopped before NM). There is an upstream commit supposed to fix this, and I'm planning on releasing that shortly.