Comment # 19 on bug 956403 from Silviu Marin-Caea

Ok, I've seen that hp_wmi remains blacklisted after installation. The thing is,
the WiFi hardware button works properly without it. If I load the hp_wmi module
with modprobe, the WiFi blue led goes off and remains off.

Here it is, without hp_wmi

silviulaptop:~ # grep wmi /etc/modprobe.d/*
/etc/modprobe.d/50-blacklist.conf:blacklist hp_wmi
silviulaptop:~ # lsmod | grep wmi
wmi                    16384  0
silviulaptop:~ # rfkill list all
0: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no
1: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no

#### Push button
silviulaptop:~ # rfkill list all
1: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: yes

#### Push again
silviulaptop:~ # rfkill list all
1: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
2: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no