Ulf Dambacher wrote:
> Hi
> 
> I hav a dell inspiron 5100 and it has no hardware button device to 
> toggle rfkill.
> The broadcom bcm4301 card has this feature and the driver sees it and 
> disables itself hard, wich can not be overwritten by software.
> 
> I tested a little bit with a hacked version always returning on on 
> rfkill pollling and that worked (partly, see next post)

As your next post shows, merely ignoring the RFKILL setting may do no good. If
the hardware sees that the radio is turned off by the "button", then there is
nothing the driver can do. The firmware will disable the radio. Accordingly,
your hack does no good.

If your laptop does not have an RFKILL button, I have no idea where the signal
to kill the radio is coming from. The BIOS in some computers has a setting that
lets Windows turn off the radio when the system hibernates. If you then boot
Linux, the radio will be off. Check if you have an option to override that
behavior in your system.

There is a facility called the Windows Management Interface (WMI) that is used
to control facilities like this. A rudimentary one for Dell laptops is floating
around, but not yet in the mainline kernels. The author is Matthew Garrett
<[email protected]>. Perhaps he knows more about the coding for Dell machines.

Larry
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