This problem also appears, if you have a wrong configuration for the wireless network (like wrong encryption for the password). In this case the same crash appears. If the connection is configured correctly it is working just fine.
So like stated before, the workaround is to configure everything correctly (not only user and password, but everything else as well) and then connecting. More precisely: With the wrong configuration for the password encryption, I got the dialogue for the password. If I filled it with the option to save it for all users or never the dialogue kept appearing without crashing (but obviously never connected). If I used the storing of the password just for this user, it produced the crash. -- 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/1604333 Title: nm-applet crashes when connecting to a wireless network, around password prompt Status in Network Manager Applet: New Status in network-manager-applet package in Ubuntu: Incomplete Bug description: $ nm-applet # then try to connect to password-protected network nm-applet-Message: New secrets for <network> 3/802-11-wireless-security requested; ask the user ** GLib:ERROR:/build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gvarianttypeinfo.c:163:g_variant_type_info_check: assertion failed: (info->alignment == 0 || info->alignment == 1 || info->alignment == 3 || info->alignment == 7) Aborted (core dumped) Looks similar to #1570738 but I'm up-to-date and still getting this. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: network-manager-gnome 1.2.0-0ubuntu0.16.04.3 ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13 Uname: Linux 4.4.0-31-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 CurrentDesktop: Unity Date: Tue Jul 19 11:44:36 2016 IfupdownConfig: # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback InstallationDate: Installed on 2016-04-05 (104 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160323) IpRoute: JournalErrors: Error: command ['journalctl', '-b', '--priority=warning', '--lines=1000'] failed with exit code 1: Hint: You are currently not seeing messages from other users and the system. Users in the 'systemd-journal' group can see all messages. Pass -q to turn off this notice. No journal files were opened due to insufficient permissions. NetworkManager.state: [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true WimaxEnabled=true SourcePackage: network-manager-applet UpgradeStatus: No upgrade log present (probably fresh install) WifiSyslog: nmcli-con: NAME UUID TYPE TIMESTAMP TIMESTAMP-REAL AUTOCONNECT AUTOCONNECT-PRIORITY READONLY DBUS-PATH ACTIVE DEVICE STATE ACTIVE-PATH NETIASPOT-948690 b911c3b7-b0ac-4070-a700-5456ca4581f8 802-11-wireless 1468873288 pon, 18 lip 2016, 22:21:28 yes 0 no /org/freedesktop/NetworkManager/Settings/3 no -- -- -- Wired connection 1 38b4206d-6e6d-4ef6-b423-ee1550bbd8f3 802-3-ethernet 1468921367 wto, 19 lip 2016, 11:42:47 yes 4294966297 no /org/freedesktop/NetworkManager/Settings/14 no -- -- -- opera-wroclaw-guest 3 3331ada7-81b4-45a4-97ed-294b010cc391 802-11-wireless 0 never yes 0 no /org/freedesktop/NetworkManager/Settings/4 no -- -- -- nmcli-dev: DEVICE TYPE STATE DBUS-PATH CONNECTION CON-UUID CON-PATH wlp3s0 wifi disconnected /org/freedesktop/NetworkManager/Devices/1 -- -- -- enp0s25 ethernet unavailable /org/freedesktop/NetworkManager/Devices/2 -- -- -- cdc-wdm0 gsm unavailable /org/freedesktop/NetworkManager/Devices/3 -- -- -- lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/0 -- -- -- nmcli-nm: RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI WWAN-HW WWAN running 1.2.0 disconnected started none enabled enabled enabled enabled enabled To manage notifications about this bug go to: https://bugs.launchpad.net/network-manager-applet/+bug/1604333/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

