Experienced same problems (iwlwifi) - was not able to connect using wicd or
wpa_supplicant directly.
wpa_supplicant gave errors:
Successfully initialized wpa_supplicant
wlan0: SME: Trying to authenticate with XX:XX:XX:XX:XX:XX (SSID='ssid'
freq=2422 MHz)
wlan0: Trying to associate with XX:XX:XX:
** Visibility changed to: Public
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Security leak - skipping authorization after logout
https://bugs.launchpad.net/bugs/362504
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