I have Xubuntu, with 3G modem internet (mobile broadband). When I did a release-upgrade from 14.10 to 15.04, the nm-applet icon permanently disappeared. (After the lightdm logon, the nm-applet is visible for a few seconds, but then disappears.) "sudo service network-manager stop && sleep 10 && sudo service network-manager start" does NOT get it back. Rebooting neither. The "sudo nmcli connection up XX" works, this is the only way to access the internet.
$ sudo nm-applet (nm-applet:3579): nm-applet-WARNING **: Cannot grab information for modem at /org/freedesktop/ModemManager1/Modem/0: No ModemManager support (nm-applet:3579): nm-applet-WARNING **: ModemManager is not available for modem at /org/freedesktop/ModemManager1/Modem/0 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to network-manager-applet in Ubuntu. https://bugs.launchpad.net/bugs/1455662 Title: nm-applet icon disappears from menu bar requiring 'sudo service network-manager stop; sudo service network-manager start' to get back. Status in network-manager-applet package in Ubuntu: Confirmed Bug description: Occasionally when changing Wi-Fi networks the nm-applet icon in the menu bar will disappear and require a reboot to get back. On previous releases I could simply killall nm-applet; nm-applet & and it would reappear but that workaround no longer works. Find my self rebooting at least once every two days because I lose nm- applet. This problem seemed to start upon upgrading to Vivid. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: network-manager-gnome 0.9.10.1-0ubuntu4 ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3 Uname: Linux 3.19.0-16-generic x86_64 ApportVersion: 2.17.2-0ubuntu1 Architecture: amd64 CurrentDesktop: Unity Date: Fri May 15 14:21:15 2015 IfupdownConfig: # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback InstallationDate: Installed on 2013-11-06 (555 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) SourcePackage: network-manager-applet UpgradeStatus: Upgraded to vivid on 2015-04-27 (18 days ago) nmcli-con: Error: command ['nmcli', '-f', 'all', 'con'] failed with exit code 9: Error: nmcli (0.9.10.0) and NetworkManager (unknown) versions don't match. Force execution using --nocheck, but the results are unpredictable. nmcli-dev: Error: command ['nmcli', '-f', 'all', 'dev'] failed with exit code 8: Error: NetworkManager is not running. nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code 2: Error: Object 'nm' is unknown, try 'nmcli help'. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager-applet/+bug/1455662/+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