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I have Ubuntu 16.04 and my wifi icon has just disppeared. It doesn't even show up in System Settings. The result of sudo lspci -nn is:

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

The result of sudo lshw -C network is:

 *-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

I have also tried:

sudo service network-manager stop

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

I also tried by changing the additional drivers as suggested in a video:

Screenshot of Software & Updates->Additional Drivers:

Screenshot of Software & Updates->Additional Drivers

Result of System Diagnostics

Result of : sudo systemctl status networking.service

But to no avail .

Please help !!

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  • What happens when you try sudo systemctl start networking.service ?
    – MadMike
    Jun 8, 2016 at 6:25
  • [main]Nothing[main] Jun 8, 2016 at 6:30
  • Can you add the output of sudo systemctl status networking.service to your question?
    – MadMike
    Jun 8, 2016 at 6:34
  • Please run the network diagnostics and edit your question to include a link to the result. Jun 8, 2016 at 8:37

1 Answer 1

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You have blacklist rt2800pci in /etc/modprobe.d/blacklist.conf and rt2800pci should be the kernel module to support your wifi.

To fix this, open a terminal window and enter

sudo sed -i 's/blacklist rt2800pci/#blacklist rt2800pci/' /etc/modprobe.d/blacklist.conf

Reboot and wifi should work. The code simply replaces blacklist rt2800pci with #blacklist rt2800pci The additional # at the beginning of the line makes it a comment

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