Приветствую, друзья!
Имею следующую проблему, с которой измучился.
Тормозит wi-fi под Linux. C Windows все нормально.

Точка: WL-520GC

Подопытная ось:
root@solariz-laptop:/home/solariz# uname -a
Linux solariz-laptop 2.6.31-20-generic #58-Ubuntu SMP Fri Mar 12 04:38:19 UTC 2010 x86_64 GNU/Linux

Сеть:
root@solariz-laptop:/home/solariz# lshw -C network
  *-network
       description: Network controller
       product: BCM4311 802.11b/g WLAN
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:0c:00.0
       version: 01
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list
       configuration: driver=b43-pci-bridge latency=0
       resources: irq:17 memory:f9ffc000-f9ffffff
  *-network
       description: Ethernet interface
       product: NetLink BCM5906M Fast Ethernet PCI Express
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:09:00.0
       logical name: eth0
       version: 02
       serial: 00:1c:23:f9:60:a3
       size: 100MB/s
       capacity: 100MB/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm vpd msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.99 duplex=full firmware=sb v3.04 ip=192.168.1.200 latency=0 link=yes multicast=yes port=twisted pair speed=100MB/s
       resources: irq:30 memory:f9bf0000-f9bfffff
  *-network
       description: Wireless interface
       physical id: 2
       logical name: wlan0
       serial: 00:1e:4c:05:5a:76
       capabilities: ethernet physical wireless
       configuration: broadcast=yes ip=192.168.1.201 multicast=yes wireless=IEEE 802.11bg

root@solariz-laptop:/home/solariz# iwconfig
lo        no wireless extensions.

eth0      no wireless extensions.

wmaster0  no wireless extensions.

wlan0     IEEE 802.11bg  ESSID:"solariZAeroNet"
          Mode:Managed  Frequency:2.412 GHz  Access Point: 90:E6:BA:92:B0:1B
          Bit Rate=54 Mb/s   Tx-Power=20 dBm
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Encryption key:4C77-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx [2]
          Power Management:off
          Link Quality=28/70  Signal level=-82 dBm  Noise level=-70 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

pan0      no wireless extensions.

Рекомендую обратить внимание, что  Link Quality=28/70 при том, что точка находится в 2 метрах без препятствий. Не смотря на Bit Rate=54 Mb/s  измеряем скорость:

<IMG SRC="http://www.speedtest.net/result/754944318.png">

root@solariz-laptop:/home/solariz# iperf -c 89.112.xxx.xxx -P 5
------------------------------------------------------------
Client connecting to 89.112.xxx.xxx, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[  7] local 192.168.1.201 port 56585 connected with 89.112.xxx.xxx port 5001
[  3] local 192.168.1.201 port 56583 connected with 89.112.xxx.xxx port 5001
[  4] local 192.168.1.201 port 56582 connected with 89.112.xxx.xxx port 5001
[  5] local 192.168.1.201 port 56584 connected with 89.112.xxx.xxx port 5001
[  6] local 192.168.1.201 port 56586 connected with 89.112.xxx.xxx port 5001
[ ID] Interval       Transfer     Bandwidth
[  7]  0.0-10.1 sec    376 KBytes    306 Kbits/sec
[  4]  0.0-10.2 sec    200 KBytes    161 Kbits/sec
[  6]  0.0-10.7 sec    256 KBytes    196 Kbits/sec
[  5]  0.0-11.0 sec    192 KBytes    142 Kbits/sec
[  3]  0.0-11.6 sec    200 KBytes    141 Kbits/sec
[SUM]  0.0-11.6 sec  1.20 MBytes    862 Kbits/sec

Теперь подключаемся к той же точке через ethernet и измеряем еще раз и оппппа, получаем заявленную провом скорость:

<IMG SRC="http://www.speedtest.net/result/754946125.png">

root@solariz-laptop:/home/solariz# iperf -c 89.112.xxx.xxx -P 5
------------------------------------------------------------
Client connecting to 89.112.xxx.xxx, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[  7] local 192.168.1.200 port 49080 connected with 89.112.xxx.xxx port 5001
[  3] local 192.168.1.200 port 49076 connected with 89.112.xxx.xxx port 5001
[  4] local 192.168.1.200 port 49077 connected with 89.112.xxx.xxx port 5001
[  5] local 192.168.1.200 port 49078 connected with 89.112.xxx.xxx port 5001
[  6] local 192.168.1.200 port 49079 connected with 89.112.xxx.xxx port 5001
[ ID] Interval       Transfer     Bandwidth
[  7]  0.0-10.1 sec    312 KBytes    252 Kbits/sec
[  5]  0.0-10.7 sec    312 KBytes    239 Kbits/sec
[  3]  0.0-11.6 sec    408 KBytes    288 Kbits/sec
[  4]  0.0-11.9 sec    416 KBytes    287 Kbits/sec
[  6]  0.0-12.4 sec    416 KBytes    275 Kbits/sec
[SUM]  0.0-12.4 sec  1.82 MBytes  1.23 Mbits/sec

Иными словами скорость падает примерно в два раза.

Пробовал b43, ssb,   виндовые   дрова от HP   через  ndiswrapper ( https://help.ubuntu.com/community/WifiDocs/Device/Broadcom_B... )

Ничего не изменилось. Прошу совета.