wpa_supplicant 0.7.3 6200 AGN problems

[Fabio Coatti]

Hi all,
I'm facing a weird issue with wpa_supplicant 0.7.3, here the
description and the environment:

wpa supplicant 0.7.3 (gentoo package wpa_supplicant-0.7.3-r1)
linux 2.6.36.1
hardware: HP elitebook 8440p
iwlagn 0000:44:00.0: Detected Intel(R) Centrino(R) Advanced-N 6200 AGN, REV=0x74
iwlagn 0000:44:00.0: loaded firmware version 9.221.4.1 build 25532

Description:
basically, wpa_supplicant is unable to speak with hardware, no
commands have effect (i.e. scan) and the only message I get is the
usual
ADDRCONF(NETDEV_UP): wlan0: link is not ready

(of course rfkill is off)

the scan window (wpa_gui) or scan result (wpa_cli) is empty, no matter
how many scans I request.

but if I issue a

iwlist wlan0 scan

I get all networks active in my area and after some second all
networks appears on wpa_gui and suddenly wpa_supplicant completes the
authentication and I'm able to get the ip address.

I've tried to debug this issue without success and also googling
didn't helped me; I will be grateful if someone gives me some hint, at
least where to look.

Thanks,

-- 
Fabio