For me, connecting to a different network works just fine. I could not find any difference between those two networks while the working one is hosted by a "Fritz!Box" by AVM and the not working one is hosted by a "D-Link" device that links back to the working one via wired Ethernet connection.
My specifications are the same as in the bug description with these differences: - Kernel: x86_64 Linux 4.4.0-53-generic - ApportVersion: 2.20.1-0ubuntu2.4 -- 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 : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp