WiFi无法正常工作，并且不会在“网络管理器”和“系统设置”中显示

我有Ubuntu 16.04，并且我的wifi图标刚刚消失了。它甚至没有出现在“系统设置”中。结果sudo lspci -nn是：

08:00.0 Network controller [0280]: Ralink corp. RT3290 Wireless 802.11n 1T/1R PCIe [1814:3290]

结果sudo lshw -C network是：

 *-network UNCLAIMED     
   description: Network controller
   product: RT3290 Wireless 802.11n 1T/1R PCIe
   vendor: Ralink corp.
   physical id: 0
   bus info: pci@0000:08:00.0
   version: 00
   width: 32 bits
   clock: 33MHz
   capabilities: pm msi pciexpress cap_list
   configuration: latency=0
   resources: memory:b5510000-b551ffff


*-network
   description: Ethernet interface
   product: RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller
   vendor: Realtek Semiconductor Co., Ltd.
   physical id: 0
   bus info: pci@0000:09:00.0
   logical name: eth0
   version: 08
   serial: a0:1d:48:df:4a:d1
   size: 100Mbit/s
   capacity: 100Mbit/s
   width: 64 bits
   clock: 33MHz
   capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
   configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl8106e-2_0.0.1 04/23/13 ip=10.51.1.199 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
   resources: irq:42 ioport:4000(size=256) memory:b5404000-b5404fff memory:b5400000-b5403fff

我也尝试过：

sudo service network-manager stop

 sudo rm /var/lib/NetworkManager/NetworkManager.state
 sudo service network-manager start

我还尝试按照视频中的建议更改其他驱动程序：

屏幕快照：软件和更新->其他驱动程序：

系统诊断结果

结果：sudo systemctl statusnetworking.service

但是无济于事。

请帮忙 ！！