There is no evidence of a bug here yet. You're getting logs reporting
that the connecton was terminated because of a short read on GRE
packets, and timeouts. I'd suggest looking at whether the underlying
connections are properly established first -- for instance, wlan0
appears to be getting turned up while you're connecting to the vpn, so
maybe the default route is changing?
Please see if you can add any additional information to this bug report.
Thanks!
May 6 13:44:29 head pppd[19706]: LCP: timeout sending Config-Requests
May 6 13:44:29 head pppd[19706]: Connection terminated.
May 6 13:44:29 head NetworkManager[958]: <warn> VPN plugin failed: 1
May 6 13:44:29 head NetworkManager[958]: SCPlugin-Ifupdown: devices removed
(path: /sys/devices/virtual/net/ppp0, iface: ppp0)
May 6 13:44:29 head pptp[19710]: nm-pptp-service-19702
warn[decaps_hdlc:pptp_gre.c:204]: short read (-1): Input/output error
May 6 13:44:29 head pppd[19706]: Modem hangup
** Changed in: network-manager (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/999193
Title:
VPN connection doesn't work on Ubuntu 12.04
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