Fix Ubuntu 15.04 can't turn on wifi problem

After installing play Ubuntu 15.04, a wireless card that does not recognize the notebook is found. Click System settings, software and updates, additional drivers. Installed inside the recommended wireless card driver, found clicking on the COM 802.11 Linux STA wireless driver source code. After you apply the changes, you are still jumping to the not applicable devices option.

Then take the following steps to start solving the problem:

Lspci-vvnn | grep 14e4

View the wireless card information.

03:00.0 Network Controller [0280]: Broadcom Corporation BCM4312 802.11b/g lp-phy [14e4:4315] (rev 01)

Card Model BCM4312

BCI ID14e4:4315

Wireless network equipment Model 4315

Then execute the following instructions in turn.

~$ sudo apt-get update~$ sudo apt-get install Bcmwl-kernel-source

The first command updates the system, and it doesn't matter if it doesn't update.

The primary is the second command, which adds a source.

~$ sudo modprobe-r b43 SSB wl~$ sudo modprobe WL

Then install the driver, restart the computer after the installation is complete.

After reboot discovery system settings-software and updates--additional drivers in the wireless NIC have selected the COM 802.11 Linux STA wireless driver source code.

System Settings-Network also has wireless buttons, but click the Enable Wireless button is not open how to do it.

This is more than a few times the computer hardware switch Wireless button, and then look back to set-up network. Discover that you can enable the wireless button.

Then you can connect to the wireless network.

Troubleshooting Ubuntu 15.04 does not turn on WiFi issues