проблема с подключением pptp vpn

Я пробовал все возможное в Интернете по этой проблеме, и нет способа ее решить. Я получил это сообщение об ошибке

, и я включил журнал, чтобы узнать, что происходит, и я получил: - [ ! d2] Oct 4 17:46:55 fathy pptp[3718]: nm-pptp-service-2330 log [ctrlp_rep:pptp_ctrl.c:259]: Sent control packet type is 3 'Stop-Control-Connection-Request' Oct 4 17:46:56 fathy systemd[1]: dev-disk-by\x2duuid-87c99260\x2d6028\x2d445c\x2d87fc\x2daf132beac596.device: Job dev-disk-by\x2duuid-87c99260\x2d6028\x2d445c\x2d87fc\x2daf132beac596.device/start timed out. Oct 4 17:46:56 fathy systemd[1]: Dependency failed for Cryptography Setup for cryptswap1. Oct 4 17:46:56 fathy systemd[1]: Dependency failed for dev-mapper-cryptswap1.device. Oct 4 17:46:56 fathy systemd[1]: Dependency failed for /dev/mapper/cryptswap1. Oct 4 17:46:56 fathy systemd[1]: dev-mapper-cryptswap1.swap: Job dev-mapper-cryptswap1.swap/start failed with result 'dependency'. Oct 4 17:46:56 fathy systemd[1]: dev-mapper-cryptswap1.device: Job dev-mapper-cryptswap1.device/start failed with result 'dependency'. Oct 4 17:46:56 fathy systemd[1]: systemd-cryptsetup@cryptswap1.service: Job systemd-cryptsetup@cryptswap1.service/start failed with result 'dependency'. Oct 4 17:46:56 fathy systemd[1]: dev-disk-by\x2duuid-87c99260\x2d6028\x2d445c\x2d87fc\x2daf132beac596.device: Job dev-disk-by\x2duuid-87c99260\x2d6028\x2d445c\x2d87fc\x2daf132beac596.device/start failed with result 'timeout'. Oct 4 17:47:06 fathy NetworkManager[818]: <info> [1507132026.9867] vpn-connection[0x55a44ce594b0,993cf7c7-1896-4328-bfc4-aba5b08be5dc,"pptp connection",0]: Started the VPN service, PID 3764 Oct 4 17:47:06 fathy NetworkManager[818]: <info> [1507132026.9985] vpn-connection[0x55a44ce594b0,993cf7c7-1896-4328-bfc4-aba5b08be5dc,"pptp connection",0]: Saw the service appear; activating connection Oct 4 17:47:07 fathy NetworkManager[818]: <info> [1507132027.1721] vpn-connection[0x55a44ce594b0,993cf7c7-1896-4328-bfc4-aba5b08be5dc,"pptp connection",0]: VPN connection: (ConnectInteractive) reply received Oct 4 17:47:07 fathy NetworkManager[818]: <info> [1507132027.4985] vpn-connection[0x55a44ce594b0,993cf7c7-1896-4328-bfc4-aba5b08be5dc,"pptp connection",0]: VPN plugin: state changed: starting (3) Oct 4 17:47:07 fathy pppd[3772]: Plugin /usr/lib/pppd/2.4.7/nm-pptp-pppd-plugin.so loaded. Oct 4 17:47:07 fathy NetworkManager[818]: Plugin /usr/lib/pppd/2.4.7/nm-pptp-pppd-plugin.so loaded. Oct 4 17:47:07 fathy pppd[3772]: pppd 2.4.7 started by root, uid 0 Oct 4 17:47:07 fathy pppd[3772]: Using interface ppp0 Oct 4 17:47:07 fathy NetworkManager[818]: ((devices/nm-device.c:970)): assertion '<dropped>' failed Oct 4 17:47:07 fathy NetworkManager[818]: Using interface ppp0 Oct 4 17:47:07 fathy pppd[3772]: Connect: ppp0 <--> /dev/pts/5 Oct 4 17:47:07 fathy NetworkManager[818]: Connect: ppp0 <--> /dev/pts/5 Oct 4 17:47:07 fathy NetworkManager[818]: <info> [1507132027.5160] manager: (ppp0): new Generic device (/org/freedesktop/NetworkManager/Devices/8) Oct 4 17:47:07 fathy pptp[3777]: nm-pptp-service-3764 log[main:pptp.c:353]: The synchronous pptp option is NOT activated Oct 4 17:47:07 fathy NetworkManager[818]: <info> [1507132027.5472] devices added (path: /sys/devices/virtual/net/ppp0, iface: ppp0) Oct 4 17:47:07 fathy NetworkManager[818]: <info> [1507132027.5472] device added (path: /sys/devices/virtual/net/ppp0, iface: ppp0): no ifupdown configuration found. Oct 4 17:47:12 fathy pptp[3603]: nm-pptp-service-3238 log[pptp_read_some:pptp_ctrl.c:593]: read error: Bad file descriptor Oct 4 17:47:12 fathy kernel: [ 1575.415489] pptpcm[3603]: segfault at 7f650114f698 ip 0000559c49bd8a62 sp 00007fffbca90d58 error 4 in pptp[559c49bd1000+f000] Oct 4 17:47:12 fathy systemd[1251]: Starting Notification regarding a crash report... Oct 4 17:47:12 fathy pptp[3792]: nm-pptp-service-3238 log[ctrlp_rep:pptp_ctrl.c:259]: Sent control packet type is 1 'Start-Control-Connection-Request' Oct 4 17:47:12 fathy update-notifier-crash[3790]: pptp Oct 4 17:47:12 fathy system-crash-no[3796]: GtkDialog mapped without a transient parent. This is discouraged. Oct 4 17:47:12 fathy hud-service[1914]: #033[31mvoid DBusMenuImporter::slotGetLayoutFinished(QDBusPendingCallWatcher*)#033[0m: "No such interface 'com.canonical.dbusmenu' on object at path /org/ayatana/bamf/window/56623112" Oct 4 17:47:38 fathy pppd[3772]: LCP: timeout sending Config-Requests Oct 4 17:47:38 fathy NetworkManager[818]: LCP: timeout sending Config-Requests Oct 4 17:47:38 fathy NetworkManager[818]: Connection terminated. Oct 4 17:47:38 fathy pppd[3772]: Connection terminated. Oct 4 17:47:38 fathy NetworkManager[818]: <info> [1507132058.5476] vpn-connection[0x55a44ce594b0,993cf7c7-1896-4328-bfc4-aba5b08be5dc,"pptp connection",0]: VPN service disappeared Oct 4 17:47:38 fathy pppd[3772]: Terminating on signal 15 Oct 4 17:47:38 fathy NetworkManager[818]: Terminating on signal 15 Oct 4 17:47:38 fathy NetworkManager[818]: Modem hangup Oct 4 17:47:38 fathy NetworkManager[818]: Child process /usr/sbin/pptp 188.121.240.5 --nolaunchpppd --loglevel 0 --logstring nm-pptp-service-3764 (pid 3775) terminated with signal 15 Oct 4 17:47:38 fathy pppd[3772]: Modem hangup Oct 4 17:47:38 fathy pppd[3772]: Child process /usr/sbin/pptp 188.121.240.5 --nolaunchpppd --loglevel 0 --logstring nm-pptp-service-3764 (pid 3775) terminated with signal 15 Oct 4 17:47:38 fathy pppd[3772]: Exit. Oct 4 17:47:38 fathy NetworkManager[818]: <info> [1507132058.5856] devices removed (path: /sys/devices/virtual/net/ppp0, iface: ppp0)

моя версия ubuntu 17.04