How do I solve the WiFi icon after the Ubuntu program is updated?

In the Ubuntu system, many users will be updated after the System pop-up update part of the program, but recently a user reflected in the update after the power-on reboot found that the WiFi icon became a fan, unable to search the signal, can not be used normally. What's going on? How do I solve the WiFi icon after the update of the Ubuntu system?

　　Resolution process:

A variety of methods have been searched on the web, and the reason may be that the driver fails. The driver was disabled after the software was updated.

　　Common solutions are:

1. Use the command Rfkill list all to view the modules that are disabled and then open the block with the command unblock.

2. Download the driver and reinstall the driver. (Can not be networked, how to download the installation of new drivers?).

　　Solution (own groping, small-crowd solution):

Find the System setup-"software and Updates-" Ubuntu software tab in the bottom of the "Restore" button, click. As shown in figure

Reboot the system again, ok,wifi out. As shown in figure