Comment 2 for bug 1528009

As a side note: after reading a lot of different forum topics I found the following method how to change "Hard blocked: yes" state to "Hard blocked: no" state of the "rfkill list" output.

On Toshiba Satellite C50-B-19U laptop, start from powered off state. Laptop batter can remain in the laptop (it is not removeable anyway easily in case of this model). AC adapter can remain plugged. Push the power button and keep it pressed. The laptop will not power up until power button is held pushed. After about 10 seconds the white LED showing that the AC adapter is connected properly is goes off and blinks once. After this the white LED is on again. The power button was kept pushed until 30 seconds is elapsed (but I'm not sure if it is needed at all, the blink of the white LED seems to be a good feedback.) When the power button is released the laptop keeps turned off. Pushing the power button again shortly starts the laptop and the following BIOS message appears:

**** RTC battery is low ****
Press Enter to set Date/Time.
[Enter]

After this BIOS Setup appears ("TOSHIBA Setup Utility") and System Time starts from 00:00:00, System Date starts from 01/01/2014. Set the time and date manually and then boot Ubuntu. The "rfkill list" shows now "Hard blocked: no"

root@ubuntu:~# rfkill list
1: phy0: Wireless LAN
 Soft blocked: no
 Hard blocked: no
root@ubuntu:~# root@csuka-ubuntu:~# rfkill list
1: phy0: Wireless LAN
 Soft blocked: no
 Hard blocked: no
root@ubuntu:~#

I don't know, however, how to reproduce the original state of this bug report: how to enable "Hard blocked: yes" state again on the internal WiFi adapter.