Following some tips I have set /etc/modprobe.d/cdc_ncm.conf: options cdc_ncm prefer_mbim=N
and it seems solve the problem. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/1172178 Title: WWAN Connection: DNS Error / PPPd not starting? Status in “network-manager” package in Ubuntu: Confirmed Bug description: I have a problem connecting on my x1 carbon - actually I didn' suceed to connect on win8 either even though I updated all drivers firmaware etc. On windows I don't know how to see whats going on and I use ubuntu for my everday work anway. I will attach / post a snipplet from syslog that showas whats happening. On another machine I am using the same SIM and also 13.04 but it works fine. There pppd ist started before dhclient. I don't see any ppp launch here and this seems stange to me. Anyway I have no Idea where to look or what to try to make it work. Could somebody help me? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1172178/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp