It seems to be the cause of my problem: http://askubuntu.com/questions/742347/wifi-r8712u-is-only-working-after-doing-rmmod-modprobe
ar 5 21:28:12 ferhat-X58A-UD5 NetworkManager[882]: <info> urfkill disappeared from the bus Mar 5 21:28:12 ferhat-X58A-UD5 NetworkManager[882]: <info> ofono is now available Mar 5 21:28:12 ferhat-X58A-UD5 NetworkManager[882]: <warn> failed to enumerate oFono devices: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.ofono was not provided by any .service files Mar 5 21:28:12 ferhat-X58A-UD5 NetworkManager[882]: <info> ModemManager available in the bus Mar 5 21:28:12 ferhat-X58A-UD5 NetworkManager[882]: <info> wpa_supplicant running Mar 5 21:28:13 ferhat-X58A-UD5 NetworkManager[882]: <error> [1457209693.030273] [platform/wifi/wifi-utils-wext.c:519] wext_get_range(): (wlan0): couldn't get driver range information (19). Mar 5 21:28:13 ferhat-X58A-UD5 NetworkManager[882]: <info> (wlan0): driver WEXT range request failed Mar 5 21:28:13 ferhat-X58A-UD5 NetworkManager[882]: <warn> (wlan0): failed to initialize WiFi driver Mar 5 21:28:13 ferhat-X58A-UD5 NetworkManager[882]: (NetworkManager:882): GLib-GObject-CRITICAL **: object NMDeviceWifi 0xfa83d0 finalized while still in-construction Mar 5 21:28:13 ferhat-X58A-UD5 NetworkManager[882]: (NetworkManager:882): GLib-GObject-CRITICAL **: Custom constructor for class NMDeviceWifi returned NULL (which is invalid). Please use GInitable instead. Mar 5 21:28:13 ferhat-X58A-UD5 NetworkManager[882]: <warn> wlan0: factory failed to create device: (unknown) Mar 5 21:28:13 ferhat-X58A-UD5 NetworkManager[882]: <info> devices added (path: /sys/devices/pci0000:00/0000:00:1a.7/usb1/1-4/1-4:1.0/net/wlx0087401008be, iface: wlx0087401008be) Mar 5 21:28:13 ferhat-X58A-UD5 NetworkManager[882]: <info> device added (path: /sys/devices/pci0000:00/0000:00:1a.7/usb1/1-4/1-4:1.0/net/wlx0087401008be, iface: wlx0087401008be): no ifupdown configuration found. Mar 5 21:28:17 ferhat-X58A-UD5 NetworkManager[882]: <info> startup complete -- 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/1518681 Title: NM failed to initialize WiFi driver (after boot/ return from suspend) Status in network-manager package in Ubuntu: Confirmed Bug description: Since 15.10 my network is not working because of this bug. I got this error: Nov 22 03:45:23 arbeits-pc NetworkManager[685]: <warn> (wlan0): failed to initialize WiFi driver Nov 22 03:45:23 arbeits-pc NetworkManager[685]: <warn> wlan0: factory failed to create device: (unknown) Nov 22 03:45:23 arbeits-pc NetworkManager[685]: (NetworkManager:685): GLib-GObject-CRITICAL **: object NMDeviceWifi 0xeda450 finalized while still in-construction Nov 22 03:45:23 arbeits-pc NetworkManager[685]: (NetworkManager:685): GLib-GObject-CRITICAL **: Custom constructor for class NMDeviceWifi returned NULL (which is invalid). Please use GInitable instead. Nov 22 03:45:23 arbeits-pc NetworkManager[685]: <info> wpa_supplicant running Nov 22 03:45:23 arbeits-pc NetworkManager[685]: <info> devices added (path: /sys/devices/pci0000:00/0000:00:1a.0/usb5/5-1/5-1.4/5-1.4:1.0/net/wlxf81a67191694, iface: wlxf81a67191694) Nov 22 03:45:23 arbeits-pc NetworkManager[685]: <info> device added (path: /sys/devices/pci0000:00/0000:00:1a.0/usb5/5-1/5-1.4/5-1.4:1.0/net/wlxf81a67191694, iface: wlxf81a67191694): no ifupdown configuration found. Only workaround: sudo systemctl restart network-manager.service ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: network-manager 1.0.4-0ubuntu5.1 ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3 Uname: Linux 4.2.0-18-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.19.1-0ubuntu5 Architecture: amd64 CurrentDesktop: Unity Date: Sun Nov 22 11:23:48 2015 IfupdownConfig: # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback InstallationDate: Installed on 2015-11-21 (0 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) IpRoute: default via 192.168.1.1 dev wlxf81a67191694 proto static metric 600 169.254.0.0/16 dev wlxf81a67191694 scope link metric 1000 192.168.1.0/24 dev wlxf81a67191694 proto kernel scope link src 192.168.1.126 metric 600 NetworkManager.state: [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true WimaxEnabled=true RfKill: SourcePackage: network-manager UpgradeStatus: No upgrade log present (probably fresh install) nmcli-dev: DEVICE TYPE STATE DBUS-PATH CONNECTION CON-UUID CON-PATH wlxf81a67191694 wifi connected /org/freedesktop/NetworkManager/Devices/2 WG-WLAN c2683c87-f2df-40a9-b40b-d2b4ec6f1d12 /org/freedesktop/NetworkManager/ActiveConnection/0 eno1 ethernet unavailable /org/freedesktop/NetworkManager/Devices/0 -- -- -- lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/1 -- -- -- nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code 2: Error: Object 'nm' is unknown, try 'nmcli help'. 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