Comment 11 for bug 1725062

I have symptoms like these as well - I think these are the relevent syslog lines:

Oct 25 23:29:34 tim-573P pppd[25897]: LCP: timeout sending Config-Requests
Oct 25 23:29:34 tim-573P NetworkManager[23036]: LCP: timeout sending Config-Requests
Oct 25 23:29:34 tim-573P NetworkManager[23036]: Connection terminated.
Oct 25 23:29:34 tim-573P pppd[25897]: Connection terminated.
Oct 25 23:29:34 tim-573P NetworkManager[23036]: <info> [1508970574.5444] vpn-connection[0x556db598a6d0,fe39617c-d214-480d-a0f1-6344e6005878,"Manifest",0]: VPN service disappeared
Oct 25 23:29:34 tim-573P NetworkManager[23036]: <info> [1508970574.5475] devices removed (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
Oct 25 23:29:34 tim-573P gnome-shell[4380]: Removing a network device that was not added
Oct 25 23:29:34 tim-573P gnome-shell[1815]: Removing a network device that was not added
Oct 25 23:29:34 tim-573P pppd[25897]: Terminating on signal 15
Oct 25 23:29:34 tim-573P NetworkManager[23036]: Terminating on signal 15
Oct 25 23:29:34 tim-573P NetworkManager[23036]: Child process /usr/sbin/pptp 77.44.84.210 --nolaunchpppd --loglevel 0 --logstring nm-pptp-service-25893 (pid 25900) terminated with signal 15
Oct 25 23:29:34 tim-573P NetworkManager[23036]: Modem hangup
Oct 25 23:29:34 tim-573P pppd[25897]: Child process /usr/sbin/pptp 77.44.84.210 --nolaunchpppd --loglevel 0 --logstring nm-pptp-service-25893 (pid 25900) terminated with signal 15
Oct 25 23:29:34 tim-573P pppd[25897]: Modem hangup
Oct 25 23:29:34 tim-573P pppd[25897]: Exit.
Oct 25 23:29:34 tim-573P zeal.desktop[14336]: "No such interface 'org.freedesktop.DBus.Properties' on object at path /org/freedesktop/NetworkManager/ActiveConnection/14"
Oct 25 23:29:34 tim-573P gnome-shell[4380]: [AppIndicatorSupport-WARN] Attempting to re-register :1.74/org/ayatana/NotificationItem/multiload; resetting instead