Seen on 16.04 with rtl8723be wifi driver, network-manager 1.2.0-0ubuntu0.16.04.2. Happens no suspend/resume AND flight mode toggle. Worked around the suspend problem by making systemd restart network-manager service after suspend, which restores network connections.
Jul 13 23:45:39 lenovo NetworkManager[2544]: <info> [1468442739.4325] manager: WiFi now enabled by radio killswitch Jul 13 23:45:39 lenovo kernel: [ 406.193741] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready Jul 13 23:45:39 lenovo wpa_supplicant[1101]: dbus: wpa_dbus_get_object_properties: failed to get object properties: (none) none Jul 13 23:45:39 lenovo wpa_supplicant[1101]: dbus: Failed to construct signal Jul 13 23:45:39 lenovo NetworkManager[2544]: <info> [1468442739.9209] device (wlp4s0): supplicant interface state: starting -> ready Jul 13 23:45:39 lenovo NetworkManager[2544]: <info> [1468442739.9210] device (wlp4s0): state change: unavailable -> disconnected (reason 'supplicant-available') [20 30 42] Jul 13 23:45:39 lenovo kernel: [ 406.242502] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready Jul 13 23:45:47 lenovo wpa_supplicant[1101]: rfkill: WLAN soft blocked Jul 13 23:45:47 lenovo wpa_supplicant[1101]: rfkill: WLAN soft blocked Jul 13 23:45:47 lenovo NetworkManager[2544]: <info> [1468442747.0170] manager: WiFi now disabled by radio killswitch Jul 13 23:45:47 lenovo NetworkManager[2544]: <info> [1468442747.0173] device (wlp4s0): state change: disconnected -> unavailable (reason 'none') [30 20 0] Jul 13 23:45:47 lenovo systemd[1]: Starting Load/Save RF Kill Switch Status... Jul 13 23:45:47 lenovo systemd[1]: Started Load/Save RF Kill Switch Status. Jul 13 23:45:47 lenovo wpa_supplicant[1101]: nl80211: deinit ifname=wlp4s0 disabled_11b_rates=0 Jul 13 23:45:51 lenovo NetworkManager[2544]: <info> [1468442751.1801] manager: WiFi now enabled by radio killswitch Jul 13 23:45:51 lenovo kernel: [ 417.961786] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready Jul 13 23:45:51 lenovo wpa_supplicant[1101]: dbus: wpa_dbus_get_object_properties: failed to get object properties: (none) none Jul 13 23:45:51 lenovo wpa_supplicant[1101]: dbus: Failed to construct signal Jul 13 23:45:51 lenovo NetworkManager[2544]: <info> [1468442751.6681] device (wlp4s0): supplicant interface state: starting -> ready Jul 13 23:45:51 lenovo kernel: [ 418.008598] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready Jul 13 23:45:51 lenovo NetworkManager[2544]: <info> [1468442751.6683] device (wlp4s0): state change: unavailable -> disconnected (reason 'supplicant-available') [20 30 42] Jul 13 23:45:51 lenovo wpa_supplicant[1101]: rfkill: WLAN soft blocked -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/1439771 Title: wpa_supplicant[874]: dbus: Failed to construct signal after 'suspend' Status in network-manager package in Ubuntu: Confirmed Bug description: The Wifi network can't connect after the wake up from suspend. Xubuntu 15.04 I'll post more useful details (journalctl log) as a comment to this bug report. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: dbus 1.8.12-1ubuntu5 Uname: Linux 4.0.0-040000rc5-generic x86_64 ApportVersion: 2.17-0ubuntu1 Architecture: amd64 CurrentDesktop: XFCE Date: Thu Apr 2 18:18:56 2015 InstallationDate: Installed on 2015-03-27 (5 days ago) InstallationMedia: Xubuntu 15.04 "Vivid Vervet" - Beta amd64 (20150326) SourcePackage: dbus UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1439771/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp