Environment: Ubuntu 16.04 Reproduce the bug: Connect to my DSL connection (configuration the same as what it was like in Ubuntu 14.04), failed Collecting Debug Information: # Start NetworkManager in DEBUG mode sudo systemctl mask NetworkManager.service sudo systemctl stop NetworkManager.service sudo NM_PPP_DEBUG=1 /usr/sbin/NetworkManager --no-daemon # Connect to your DSL via NetworkManager GUI # Debug Information shown here: Plugin rp-pppoe.so loaded. Plugin /usr/lib/pppd/2.4.7/nm-pppd-plugin.so loaded. nm-pppd-plugin-Message: nm-ppp-plugin: (plugin_init): initializing nm-pppd-plugin-Message: nm-ppp-plugin: (nm_phasechange): status 3 / phase 'serial connection' Send PPPOE Discovery V1T1 PADI session 0x0 length 12 dst ff:ff:ff:ff:ff:ff src 5c:f9:dd:5f:86:04 [service-name] [host-uniq 31 6f 00 00] Recv PPPOE Discovery V1T1 PADO session 0x0 length 40 dst 5c:f9:dd:5f:86:04 src ac:4e:91:64:55:d3 [service-name] [host-uniq 31 6f 00 00] [AC-name SH-SH-FT-BAS-1.MAN.ME60X] Send PPPOE Discovery V1T1 PADR session 0x0 length 12 dst ac:4e:91:64:55:d3 src 5c:f9:dd:5f:86:04 [service-name] [host-uniq 31 6f 00 00] Recv PPPOE Discovery V1T1 PADS session 0x5894 length 12 dst 5c:f9:dd:5f:86:04 src ac:4e:91:64:55:d3 [service-name] [host-uniq 31 6f 00 00] PADS: Service-Name: '' PPP session is 22676 Connected to ac:4e:91:64:55:d3 via interface enp3s0 using channel 9 Using interface ppp0 Connect: ppp0 <--> enp3s0 nm-pppd-plugin-Message: nm-ppp-plugin: (nm_phasechange): status 5 / phase 'establish' sent [LCP ConfReq id=0x1 ] rcvd [LCP ConfAck id=0x1 ] sent [LCP ConfReq id=0x1 ] rcvd [LCP ConfReq id=0x2 ] sent [LCP ConfAck id=0x2 ] rcvd [LCP ConfAck id=0x1 ] sent [LCP EchoReq id=0x0 magic=0xd5cccece] nm-pppd-plugin-Message: nm-ppp-plugin: (nm_phasechange): status 6 / phase 'authenticate' nm-pppd-plugin-Message: nm-ppp-plugin: (get_credentials): passwd-hook, requesting credentials... (process:28465): nm-pppd-plugin-WARNING **: nm-ppp-plugin: (get_credentials): could not get secrets: GDBus.Error:org.freedesktop.NetworkManager.Settings.Failed: The connection was modified since activation sent [PAP AuthReq id=0x1 user="11122057@shu" password=] rcvd [LCP EchoRep id=0x0 magic=0x9cf8645d] sent [PAP AuthReq id=0x2 user="11122057@shu" password=] sent [PAP AuthReq id=0x3 user="11122057@shu" password=] sent [PAP AuthReq id=0x4 user="11122057@shu" password=] sent [PAP AuthReq id=0x5 user="11122057@shu" password=] sent [PAP AuthReq id=0x6 user="11122057@shu" password=] rcvd [PAP AuthNak id=0x6 "No response"] Remote message: No response PAP authentication failed nm-pppd-plugin-Message: nm-ppp-plugin: (nm_phasechange): status 10 / phase 'terminate' nm-pppd-plugin-Message: nm-ppp-plugin: (nm_phasechange): status 5 / phase 'establish' sent [LCP TermReq id=0x2 "Failed to authenticate ourselves to peer"] rcvd [LCP TermReq id=0x3] sent [LCP TermAck id=0x3] Modem hangup nm-pppd-plugin-Message: nm-ppp-plugin: (nm_phasechange): status 11 / phase 'disconnect' Connection terminated. Failed to disconnect PPPoE socket: 114 Operation already in progress nm-pppd-plugin-Message: nm-ppp-plugin: (nm_phasechange): status 1 / phase 'dead' nm-pppd-plugin-Message: nm-ppp-plugin: (nm_exit_notify): cleaning up # clean up sudo systemctl unmask NetworkManager.service sudo systemctl restart NetworkManager.service

Ubuntunetwork-manager package

History of question #294365

Ubuntu
network-manager package