Comment # 29 on bug 956403 from Silviu Marin-Caea

It appears to be working properly with the 13.2 kernel.

13:06:11 silviulaptop:~ # uname --all                                           
Linux silviulaptop.otpbank.ro 3.16.6-2-default #1 SMP Mon Oct 20 13:47:22 UTC
2014 (feb42ea) x86_64 x86_64 x86_64 GNU/Linux
13:06:17 silviulaptop:~ # lsmod | grep wmi
wmi                    19193  0
### load hp_wmi, blue LED remains on
13:06:28 silviulaptop:~ # modprobe hp_wmi
13:06:53 silviulaptop:~ # rfkill list all
0: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no
1: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
13:07:08 silviulaptop:~ # lsmod | grep wmi
hp_wmi                 14109  0
sparse_keymap          13948  1 hp_wmi
rfkill                 26772  7 cfg80211,hp_wmi,bluetooth
wmi                    19193  1 hp_wmi
### push button here, blue LED goes out
13:07:21 silviulaptop:~ # rfkill list all
1: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: yes
### push button again, blue LED turns on
13:07:39 silviulaptop:~ # rfkill list all
1: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
2: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no