Ivo van Doorn schrieb:
> Hmm, thats odd. It should at least support adhoc.
> (Master mode depends on mac80211, regular mac80211 versions found
> in the kernel don't support it yet, and they need patches from
> Johannes Berg).
> 
> Does 'dmesg' indicate anything?
> 

Loaded the current tarball.
There are not many error or warning messages in dmeg output anymore.
Like before I found "ADDRCONF(NETDEV_UP): wlan0: link is not ready"
but I thought, that this probably tells me, that it could not "see" any 
access point (which is true).

dmesg output etc. is attached.

It seems, that ad-hoc is not needed by many people. And for me wlan is 
nice to have, not a must. So, I do not want to waste your time any 
longer to get this 'special' case runnning.

Thank you all very much for your help!
Franz