Hello,
I need wlan with >60Mb/s. Additionally, 2.4GHz is overloaded. 5GHz should be used. Especially the channels >=100 are completely free. The network controller is:
Code:
0c:00.0 Network controller [0280]: Broadcom Corporation BCM4322 802.11a/b/g/n Wireless LAN Controller [14e4:432b] (rev 01)
    Subsystem: Dell Wireless 1510 Wireless-N WLAN Mini-Card [1028:000d]
    Kernel driver in use: b43-pci-bridge
    Kernel modules: ssb
802.11n and channels >=100 do work with Windows XP. The 5GHz Channels <100 are OK, too.

On Ubuntu 12.04 the best what I get is wl:
Code:
eth1      IEEE 802.11abg  ESSID:"XXXX"  
          Mode:Managed  Frequency:2.427 GHz  Access Point: 00:24:FE:08:D1:AB   
          Bit Rate=54 Mb/s   Tx-Power=200 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=66/70  Signal level=-44 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:54   Missed beacon:0
802.11n doesn't work. 5Ghz works but without channels >=100 (I use "iwlist wlan1 frequency").

brcmsmac:
Code:
wlan1     IEEE 802.11bg  ESSID:"XXXX"  
          Mode:Managed  Frequency:2.427 GHz  Access Point: 00:24:FE:08:D1:AB   
          Bit Rate=12 Mb/s   Tx-Power=20 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=63/70  Signal level=-47 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:54   Missed beacon:0
5GHZ doesn't work at all and I get <12Mb/s.

b43:
Code:
wlan1     IEEE 802.11bg  ESSID:"XXXX"  
          Mode:Managed  Frequency:2.427 GHz  Access Point: 00:24:FE:08:D1:AB   
          Bit Rate=48 Mb/s   Tx-Power=20 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=68/70  Signal level=-42 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:53   Missed beacon:0
5GHZ doesn't work at all and I get <12Mb/s.

ndiswrapper:
iwconfig says just 802.11g is supported. 5GHZ doesn't work. I can connect with 2.4 GHz to a Access Point and I get a IP from the DHCP. But no other data can be transferred. Maybe a problem with the encryption?

I posted no logs, because I don't know how I should continue (which driver?). The syslog seems ok for all drivers. I hoped ndiswrapper would work, because the Windows driver works.
Any suggestions? Or should I buy an other controller?