Android howto

Sean McNeil sean at
Tue Dec 2 18:21:51 CET 2008

Werner Almesberger wrote:
> Sean McNeil wrote:
>> This has been broken for me a long time on various kernels. It must me  
>> something I'm doing wrong. I'll need to get Werner to help me on this. I  
>> just can't get anything on a scan at all.
> Does this happen with  iwlist scan  or with some other program ?

It is happening with wpa_cli. I basically get a message:

ar6000_ioctl_giwscan(): data length 0

I think it is an wext issue. with wpa_supplicant support.

> Also, if even iwlist scan doesn't work, does anything run before it
> that touches WLAN ?

Yes, it would appear that iwlist is working. I'll need to see what it is 
doing differently.

> As far as I can tell, at least iwlist scan on a pristine system (i.e.,
> one that doesn't do things with WLAN on its own) works for everyone.
> The real problems only seem to kick in once wpa_supplicant had a
> chance to run.

OK, so it is probably something in the wext layer?

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