Comment 6 for bug 977639

I can confirm this bug affects my laptop Sony Vaio F Series model VPCF120FL, that uses Intel Corporation Centrino Advanced-N 6200, wireless card.

To reproduce, one just have to follow the steps mentioned in comment #3:
 * Click nm-applet to activate the drop-down.
 * Uncheck "Enable Wireless" from the nm-applet drop-down.
 * Click nm-applet a second time to activate the drop-down.
 * Note under "Wireless Networks" in the nm-applet drop-down, the message "wireless is disabled by hardware switch".
 * Note that "Enable Wireless" in the nm-applet drop-down is greyed out.

To re-enable wireless:

 * Open a terminal.
        $ sudo rfkill unblock all
        $ sudo service network-manager restart
 * Click nm-applet to activate the drop-down.
 * Check "Enable Wireless" from the nm-applet drop-down.