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2 wireless NICS in laptop; one can authenticate, one can't. Why the difference?

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The laptop is an HP Compaq tc4400, running OpenSUSE 12.2. It has a builtin Broadcom 4311 adapter, for which I have installed the firmware. Everything seems okay on the hardware side; the adapter shows up in iwconfig and ifconfig, I can scan my access point with it. However, I can't get the adapter to authenticate with the access point. The process seems to get as far as wpa_supplicant attempting authentication - I get the following in the wpa_supplicant log file:

wlan1: SME: Trying to authenticate with 12:34:56:78:90:12 (SSID='network' freq=2457 MHz)

repeated multiple times, but no connection is ever made. dmesg returns

wlan1: authenticate with 12:34:56:78:90:12
wlan1: send auth to 12:34:56:78:90:12 (try 1/3)
wlan1:
12:34:56:78:90:12 denied authentication (status 1)

also repeated multiple times. I haven't found anything that says what 'status 1' means.
The thing is, I have a Netgear WG111v3 USB adapter that I can plug in and it works just fine:

wlan0: authenticate with 12:34:56:78:90:12
wlan0: send auth to 12:34:56:78:90:12 (try 1/3)
wlan0: authenticated
wlan0: associate with 12:34:56:78:90:12 (try 1/3)
wlan0: RX AssocResp from 12:34:56:78:90:12 (capab=0x401 status=0 aid=3)
wlan0: associated

I would really like to get the on-board Broadcom working, but I have no idea where the difference between the two is coming from. I use NetworkManager to handle the network interfaces, and I'm not seeing any obvious configuration differences (but I may not know where to look). I've tried running wpa_supplicant manually for debugging, but I don't see anything helpful in the output.

If anybody has ideas, I'd be grateful. I see people on the Internet with similar sorts of symptoms, but none of the other solutions have been appropriate.

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