Public bug reported: I am trying to use a USB modem (dongle) Samsung SGH-Z810. (It is a GSM device serving to connect to a 3G mobile broadband network in my case).
How can I reproduce the bug: 1.) I start the computer (a HP ZBook 15 notebook). 2.) Once the system (64-bit ubuntu) is running and I am logged in I wait for say 10 seconds and then insert the modem into a USB port. Nothing happens. NetworkManager does not list this networking option even after another period of waiting. 3.) I unplug the modem and after a while I insert it again. FInally I can see the networking option listed in the NetworkManager menu and I can connect. Even this has to be done manually although I asked for automatic connection in the NetworkManager settings. Other way to start the computer is to do it with the modem inserted in a USB port. If I do it the problem is the same: I have to unplug the dongle and reinsert it before I can start networking. The computer seemingly randomly chooses to display or not to display the device folder in a File Manager item. I experience similar issues also with a different USB modem: HUAWEI E3251. The difference is that this one at least connects automatically. It is formally seen as an ethernet device though. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: modemmanager 1.0.0-2 ProcVersionSignature: Ubuntu 3.13.0-8.28-generic 3.13.2 Uname: Linux 3.13.0-8-generic x86_64 ApportVersion: 2.13.2-0ubuntu4 Architecture: amd64 CurrentDesktop: Unity Date: Mon Feb 17 06:58:31 2014 InstallationDate: Installed on 2014-01-31 (16 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140130) SourcePackage: modemmanager UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: modemmanager (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug trusty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1280966 Title: Samsung SGH-Z810 dongle does not work after the first insertion To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/modemmanager/+bug/1280966/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs