I am experiencing exactly the same problem! here is my log before, while and after I connect to VPN using the networkmanager. I tested it with a cable connection. It happens ONLY with the wireless, not with the wired connection.
nadi-laptop:~$ sudo tail -f /var/log/syslog Feb 13 18:28:04 nadi-laptop dhclient: bound to 10.0.0.5 -- renewal in 15 seconds. Feb 13 18:28:04 nadi-laptop NetworkManager: <info> DHCP daemon state is now 3 (renew) for interface wlan0 Feb 13 18:28:19 nadi-laptop dhclient: DHCPREQUEST of <null address> on wlan0 to 10.0.0.1 port 67 Feb 13 18:28:19 nadi-laptop dhclient: DHCPACK of 10.0.0.5 from 10.0.0.1 Feb 13 18:28:19 nadi-laptop dhclient: bound to 10.0.0.5 -- renewal in 12 seconds. Feb 13 18:28:19 nadi-laptop NetworkManager: <info> DHCP daemon state is now 3 (renew) for interface wlan0 Feb 13 18:28:31 nadi-laptop dhclient: DHCPREQUEST of <null address> on wlan0 to 10.0.0.1 port 67 Feb 13 18:28:31 nadi-laptop dhclient: DHCPACK of 10.0.0.5 from 10.0.0.1 Feb 13 18:28:31 nadi-laptop NetworkManager: <info> DHCP daemon state is now 3 (renew) for interface wlan0 Feb 13 18:28:31 nadi-laptop dhclient: bound to 10.0.0.5 -- renewal in 14 seconds. Feb 13 18:28:45 nadi-laptop dhclient: DHCPREQUEST of <null address> on wlan0 to 10.0.0.1 port 67 Feb 13 18:28:45 nadi-laptop dhclient: DHCPACK of 10.0.0.5 from 10.0.0.1 Feb 13 18:28:45 nadi-laptop dhclient: bound to 10.0.0.5 -- renewal in 13 seconds. Feb 13 18:28:45 nadi-laptop NetworkManager: <info> DHCP daemon state is now 3 (renew) for interface wlan0 Feb 13 18:28:58 nadi-laptop dhclient: DHCPREQUEST of <null address> on wlan0 to 10.0.0.1 port 67 Feb 13 18:28:58 nadi-laptop dhclient: DHCPACK of 10.0.0.5 from 10.0.0.1 Feb 13 18:28:58 nadi-laptop dhclient: bound to 10.0.0.5 -- renewal in 13 seconds. Feb 13 18:28:58 nadi-laptop NetworkManager: <info> DHCP daemon state is now 3 (renew) for interface wlan0 Feb 13 18:29:11 nadi-laptop dhclient: DHCPREQUEST of <null address> on wlan0 to 10.0.0.1 port 67 Feb 13 18:29:11 nadi-laptop dhclient: DHCPACK of 10.0.0.5 from 10.0.0.1 Feb 13 18:29:11 nadi-laptop dhclient: bound to 10.0.0.5 -- renewal in 13 seconds. Feb 13 18:29:11 nadi-laptop NetworkManager: <info> DHCP daemon state is now 3 (renew) for interface wlan0 Feb 13 18:29:24 nadi-laptop dhclient: DHCPREQUEST of <null address> on wlan0 to 10.0.0.1 port 67 Feb 13 18:29:24 nadi-laptop dhclient: DHCPACK of 10.0.0.5 from 10.0.0.1 Feb 13 18:29:24 nadi-laptop dhclient: bound to 10.0.0.5 -- renewal in 13 seconds. Feb 13 18:29:24 nadi-laptop NetworkManager: <info> DHCP daemon state is now 3 (renew) for interface wlan0 Feb 13 18:29:37 nadi-laptop dhclient: DHCPREQUEST of <null address> on wlan0 to 10.0.0.1 port 67 Feb 13 18:29:37 nadi-laptop dhclient: DHCPACK of 10.0.0.5 from 10.0.0.1 Feb 13 18:29:37 nadi-laptop NetworkManager: <info> DHCP daemon state is now 3 (renew) for interface wlan0 Feb 13 18:29:37 nadi-laptop dhclient: bound to 10.0.0.5 -- renewal in 16 seconds. Feb 13 18:29:53 nadi-laptop dhclient: DHCPREQUEST of <null address> on wlan0 to 10.0.0.1 port 67 Feb 13 18:29:53 nadi-laptop dhclient: DHCPACK of 10.0.0.5 from 10.0.0.1 Feb 13 18:29:53 nadi-laptop NetworkManager: <info> DHCP daemon state is now 3 (renew) for interface wlan0 Feb 13 18:29:53 nadi-laptop dhclient: bound to 10.0.0.5 -- renewal in 13 seconds. Feb 13 18:29:59 nadi-laptop NetworkManager: <info> Will activate VPN connection 'NTNU VPN', service 'org.freedesktop.NetworkManager.vpnc', user_name 'nadi', vpn_data 'IPSec gateway / 129.241.77.40 / IPSec ID / alle / Xauth username / barc', route ''. Feb 13 18:29:59 nadi-laptop NetworkManager: <info> VPN Activation (NTNU VPN) Stage 1 of 4 (Connection Prepare) scheduled... Feb 13 18:29:59 nadi-laptop NetworkManager: <info> VPN Activation (NTNU VPN) Stage 1 of 4 (Connection Prepare) ran VPN service daemon org.freedesktop.NetworkManager.vpnc (PID 22538) Feb 13 18:29:59 nadi-laptop NetworkManager: <info> VPN Activation (NTNU VPN) Stage 1 of 4 (Connection Prepare) complete. Feb 13 18:29:59 nadi-laptop NetworkManager: <info> VPN Activation (NTNU VPN) Stage 2 of 4 (Connection Prepare Wait) scheduled... Feb 13 18:29:59 nadi-laptop kernel: [ 125.478860] tun: Universal TUN/TAP device driver, 1.6 Feb 13 18:29:59 nadi-laptop kernel: [ 125.478906] tun: (C) 1999-2004 Max Krasnyansky <m...@qualcomm.com> Feb 13 18:29:59 nadi-laptop NetworkManager: <info> VPN service 'org.freedesktop.NetworkManager.vpnc' signaled state change 1 -> 6. Feb 13 18:30:00 nadi-laptop NetworkManager: <info> VPN Activation (NTNU VPN) Stage 2 of 4 (Connection Prepare Wait) waiting... Feb 13 18:30:00 nadi-laptop NetworkManager: <info> VPN Activation (NTNU VPN) Stage 2 of 4 (Connection Prepare Wait) complete. Feb 13 18:30:00 nadi-laptop NetworkManager: <info> VPN Activation (NTNU VPN) Stage 3 of 4 (Connect) scheduled... Feb 13 18:30:00 nadi-laptop NetworkManager: <info> VPN Activation (NTNU VPN) Stage 3 of 4 (Connect) sending connect request. Feb 13 18:30:00 nadi-laptop NetworkManager: <info> VPN Activation (NTNU VPN) Stage 3 of 4 (Connect) request sent, waiting for reply... Feb 13 18:30:00 nadi-laptop NetworkManager: <info> VPN service 'org.freedesktop.NetworkManager.vpnc' signaled state change 6 -> 3. Feb 13 18:30:00 nadi-laptop NetworkManager: <info> VPN Activation (NTNU VPN) Stage 3 of 4 (Connect) reply received. Feb 13 18:30:00 nadi-laptop NetworkManager: <info> VPN Activation (NTNU VPN) Stage 4 of 4 (IP Config Get) timeout scheduled... Feb 13 18:30:00 nadi-laptop NetworkManager: <info> VPN Activation (NTNU VPN) Stage 3 of 4 (Connect) complete, waiting for IP configuration... Feb 13 18:30:00 nadi-laptop kernel: [ 125.561803] tun0: Disabled Privacy Extensions Feb 13 18:30:02 nadi-laptop vpnc[22545]: can't open pidfile /var/run/vpnc/pid for writing Feb 13 18:30:02 nadi-laptop NetworkManager: <info> VPN Activation (NTNU VPN) Stage 4 of 4 (IP Config Get) reply received. Feb 13 18:30:03 nadi-laptop NetworkManager: <info> Clearing nscd hosts cache. Feb 13 18:30:03 nadi-laptop NetworkManager: <WARN> nm_spawn_process(): nm_spawn_process('/usr/sbin/nscd -i hosts'): could not spawn process. (Failed to execute child process "/usr/sbin/nscd" (No such file or directory)) Feb 13 18:30:03 nadi-laptop NetworkManager: <info> VPN Activation (NTNU VPN) Stage 4 of 4 (IP Config Get) complete. Feb 13 18:30:03 nadi-laptop NetworkManager: <info> VPN Activation (NTNU VPN) successful. Feb 13 18:30:03 nadi-laptop NetworkManager: <info> VPN service 'org.freedesktop.NetworkManager.vpnc' signaled state change 3 -> 4. Feb 13 18:30:06 nadi-laptop dhclient: DHCPREQUEST of <null address> on wlan0 to 10.0.0.1 port 67 Feb 13 18:30:06 nadi-laptop dhclient: DHCPACK of 10.0.0.5 from 10.0.0.1 Feb 13 18:30:06 nadi-laptop NetworkManager: <info> DHCP daemon state is now 3 (renew) for interface wlan0 Feb 13 18:30:06 nadi-laptop dhclient: bound to 10.0.0.5 -- renewal in 14 seconds. Feb 13 18:30:20 nadi-laptop dhclient: DHCPREQUEST of <null address> on wlan0 to 10.0.0.1 port 67 Feb 13 18:30:20 nadi-laptop dhclient: DHCPACK of 10.0.0.5 from 10.0.0.1 Feb 13 18:30:20 nadi-laptop dhclient: bound to 10.0.0.5 -- renewal in 15 seconds. Feb 13 18:30:20 nadi-laptop NetworkManager: <info> DHCP daemon state is now 3 (renew) for interface wlan0 ^[[5~Feb 13 18:30:35 nadi-laptop dhclient: DHCPREQUEST of <null address> on wlan0 to 10.0.0.1 port 67 Feb 13 18:30:35 nadi-laptop dhclient: DHCPACK of 10.0.0.5 from 10.0.0.1 Feb 13 18:30:35 nadi-laptop NetworkManager: <info> DHCP daemon state is now 3 (renew) for interface wlan0 Feb 13 18:30:35 nadi-laptop dhclient: bound to 10.0.0.5 -- renewal in 15 seconds. Feb 13 18:30:50 nadi-laptop dhclient: DHCPREQUEST of <null address> on wlan0 to 10.0.0.1 port 67 Feb 13 18:30:50 nadi-laptop dhclient: DHCPACK of 10.0.0.5 from 10.0.0.1 Feb 13 18:30:50 nadi-laptop NetworkManager: <info> DHCP daemon state is now 3 (renew) for interface wlan0 Feb 13 18:30:50 nadi-laptop dhclient: bound to 10.0.0.5 -- renewal in 13 seconds. Feb 13 18:31:03 nadi-laptop dhclient: DHCPREQUEST of <null address> on wlan0 to 10.0.0.1 port 67 Feb 13 18:31:03 nadi-laptop dhclient: DHCPACK of 10.0.0.5 from 10.0.0.1 Feb 13 18:31:03 nadi-laptop NetworkManager: <info> DHCP daemon state is now 3 (renew) for interface wlan0 Feb 13 18:31:03 nadi-laptop dhclient: bound to 10.0.0.5 -- renewal in 16 seconds. ^TFeb 13 18:31:19 nadi-laptop dhclient: DHCPREQUEST of <null address> on wlan0 to 10.0.0.1 port 67 Feb 13 18:31:19 nadi-laptop dhclient: DHCPACK of 10.0.0.5 from 10.0.0.1 Feb 13 18:31:19 nadi-laptop NetworkManager: <info> DHCP daemon state is now 3 (renew) for interface wlan0 Feb 13 18:31:19 nadi-laptop dhclient: bound to 10.0.0.5 -- renewal in 15 seconds. Feb 13 18:31:24 nadi-laptop NetworkManager: <info> Will deactivate the VPN connection 'NTNU VPN', service 'org.freedesktop.NetworkManager.vpnc'. Feb 13 18:31:24 nadi-laptop NetworkManager: <info> Clearing nscd hosts cache. Feb 13 18:31:24 nadi-laptop NetworkManager: <WARN> nm_spawn_process(): nm_spawn_process('/usr/sbin/nscd -i hosts'): could not spawn process. (Failed to execute child process "/usr/sbin/nscd" (No such file or directory)) Feb 13 18:31:24 nadi-laptop avahi-daemon[5148]: Withdrawing address record for 10.0.0.5 on wlan0. Feb 13 18:31:24 nadi-laptop avahi-daemon[5148]: Leaving mDNS multicast group on interface wlan0.IPv4 with address 10.0.0.5. Feb 13 18:31:24 nadi-laptop avahi-daemon[5148]: Interface wlan0.IPv4 no longer relevant for mDNS. Feb 13 18:31:24 nadi-laptop avahi-daemon[5148]: Withdrawing address record for fe80::21d:e0ff:fe1b:5355 on wlan0. Feb 13 18:31:24 nadi-laptop avahi-daemon[5148]: Joining mDNS multicast group on interface wlan0.IPv4 with address 10.0.0.5. Feb 13 18:31:24 nadi-laptop avahi-daemon[5148]: New relevant interface wlan0.IPv4 for mDNS. Feb 13 18:31:24 nadi-laptop avahi-daemon[5148]: Registering new address record for 10.0.0.5 on wlan0.IPv4. Feb 13 18:31:25 nadi-laptop vpnc[22545]: select: Interrupted system call Feb 13 18:31:25 nadi-laptop NetworkManager: <info> VPN service 'org.freedesktop.NetworkManager.vpnc' signaled state change 4 -> 5. Feb 13 18:31:25 nadi-laptop NetworkManager: <info> VPN service 'org.freedesktop.NetworkManager.vpnc' signaled state change 5 -> 6. Feb 13 18:31:25 nadi-laptop vpnc[22545]: terminated by signal: 15 Feb 13 18:31:34 nadi-laptop dhclient: DHCPREQUEST of <null address> on wlan0 to 10.0.0.1 port 67 Feb 13 18:31:34 nadi-laptop dhclient: DHCPACK of 10.0.0.5 from 10.0.0.1 Feb 13 18:31:34 nadi-laptop dhclient: bound to 10.0.0.5 -- renewal in 13 seconds. Feb 13 18:31:34 nadi-laptop NetworkManager: <info> DHCP daemon state is now 3 (renew) for interface wlan0 Feb 13 18:31:47 nadi-laptop dhclient: DHCPREQUEST of <null address> on wlan0 -- VPN connection in Network Manager looses DNS server with DHCP renew of parent connection. https://bugs.launchpad.net/bugs/255480 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs