rfkill initial state

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rfkill initial state

Joachim Breitner-2

I know this comes up repeatedly, but still: I have trouble with my
rfkill setup. I have a T430s with three rfkill switches: bluetooth,
wlan, wwan. I want bluetooth and wwan to be off by default. For wlan
always off or last state is both ok, as I can quickly turn it on using
Fn-F5 if required. (In contrast to my T400 wpa_supplicant correctly
detects the INTERFACE_DISABLED state and waits patiently until it comes
up again.)

I checked if the state is maybe automatically preserved over boots, but
that is not true. So I did

$ cat /etc/modprobe.d/rfkill.conf
options rfkill default_state=0 master_switch_mode=0

and indeed, bluetooth and wlan come up disabled, but not so wwan. Any
idea why? Is there a better way to disable these devices (but not
permanently, I still want to be able to activate them using
        echo 1 > /sys/devices/platform/thinkpad_acpi/wwan_enable
in my /etc/network/interfaces.)

Also, is the rfkill switch enough to actually power down the device
devices and save power, or is more required to do so?


Joachim "nomeata" Breitner
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