Comment 92 for bug 182716

Interestingly, my wireless fails completely now. I think this might be since the last kernel upgraded (to 2.6.24-17). Knetwork manager recognises that the device exists, however it won't find any networks, regardless of what I do. As soon ad I modprobe either b43 OR bcm43xx, knetworkmanager recognises that there's a device:

$ uname -a
Linux naught101-laptop 2.6.24-17-generic #1 SMP Thu May 1 14:31:33 UTC 2008 i686 GNU/Linux

$ sudo modprobe -r bcm43xx
$ sudo modprobe -r b43
lsmod returns no instances of b43 or bcm43xx
knetworkmanager doesn't see any wireless device

$ sudo modprobe bcm43xx
$ lsmod | grep bcm43xx
bcm43xx 127720 0
ieee80211softmac 30976 1 bcm43xx
ieee80211 35528 2 bcm43xx,ieee80211softmac
Knetworkmanager finds device "Broadcom Corporation BCM4306 802.11b/g Wireless LAN Controller (wlan0)

$ sudo modprobe -r bcm43xx
naught101@naught101-laptop:~$ sudo modprobe b43
naught101@naught101-laptop:~$ lsmod|grep b43
b43 115104 0
ssb 32260 1 b43
led_class 6020 1 b43
input_polldev 5896 1 b43
mac80211 165652 2 b43,rtl8187
rfkill 8592 3 b43,rfkill_input
Knetworkmanager finds device "Unknown Unknown (wlan0)"

wmaster0 is only created with b43, and not bcm43xx, and it has no wireless extensions:
$ iwconfig
lo no wireless extensions.
eth0 no wireless extensions.
wmaster0 no wireless extensions.
wlan0 IEEE 802.11g ESSID:""
          Mode:Managed Frequency:2.412 GHz Access Point: Not-Associated
          Tx-Power=27 dBm
          Retry min limit:7 RTS thr:off Fragment thr=2346 B
          Link Quality:0 Signal level:0 Noise level:0
          Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
          Tx excessive retries:0 Invalid misc:0 Missed beacon:0

I can't set the card to ad-hoc:
$ sudo iwconfig wlan0 mode Ad-Hoc
Error for wireless request "Set Mode" (8B06) :
    SET failed on device wlan0 ; Device or resource busy.

If I can provide any more useful information, let me know what it is an how to get it.