I'm experiencing this with the regular Gnome 15.04. It happened while I've been continuously switching "Enable Wi-fi" on/off while messing with my router because my SSID wasn't showing. It was from a desktop after a reboot. Restarting the "NetworkManager.service" (which was still active and running) brought back the wifi functionality.
$ journalctl -xe ***** Jul 16 07:36:33 devx64 wpa_supplicant[1346]: rfkill: WLAN soft blocked Jul 16 07:36:33 devx64 NetworkManager[1111]: <info> WiFi hardware radio set disabled Jul 16 07:36:33 devx64 NetworkManager[1111]: <info> (wlan0): device state change: disconnected -> unavailable (reason 'none') [30 20 0] Jul 16 07:36:33 devx64 NetworkManager[1111]: <info> (wlan0): deactivating device (reason 'none') [0] Jul 16 07:36:33 devx64 NetworkManager[1111]: <info> WiFi now disabled by radio killswitch Jul 16 07:37:02 devx64 NetworkManager[1111]: <info> WiFi hardware radio set enabled Jul 16 07:37:02 devx64 NetworkManager[1111]: <info> WiFi now enabled by radio killswitch Jul 16 07:37:02 devx64 wpa_supplicant[1346]: dbus: wpa_dbus_get_object_properties: failed to get object properties: (none) none Jul 16 07:37:02 devx64 wpa_supplicant[1346]: dbus: Failed to construct signal Jul 16 07:37:02 devx64 NetworkManager[1111]: <warn> could not get interface properties: No readable properties in this interface. Jul 16 07:37:02 devx64 NetworkManager[1111]: <info> (wlan0): supplicant interface state: starting -> ready Jul 16 07:37:02 devx64 NetworkManager[1111]: <info> (wlan0): device state change: unavailable -> disconnected (reason 'supplicant-available') [ Jul 16 07:37:02 devx64 NetworkManager[1111]: <warn> could not get interface properties: No readable properties in this interface. ***** -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to dbus in Ubuntu. https://bugs.launchpad.net/bugs/1439771 Title: wpa_supplicant[874]: dbus: Failed to construct signal after 'suspend' Status in dbus package in Ubuntu: Confirmed Status in systemd 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/dbus/+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
