How do I get my card to use turbo mode?
See here for a short explanation of what turbo mode is.
You can set your card to static turbo mode in master, managed and ad-hoc mode. Unfortunately, the driver does not support dynamic turbo mode yet. This means that non-turbo cards will not be able to associate with your AP, and also MadWifi cards not in turbo modes ( or, apparently, other makes of cards) won’t be able to see it.
Turbo mode is just a double channel (2*20MHz). If the driver is set to 54 mbit rate (static, no auto) and one enables turbo, that will give you 108 mbit link speed. There is no reported rate called 108 mbit, in turbo mode the real rate is the reported rate*2.
One may need to set the countrycode ( UserDocs/CountryCode ) to 0 to get turbo mode working.
Issue the following commands:
iwpriv ath0 mode 3 # this forces it to G-only mode, but you can also use A mode (1)) iwpriv ath0 turbo 1 # enable turbo iwpriv ath0 mode 5 # required if the interface is in 11a managed (STA) mode
This might not enable turbo ;) Depends on you countrycode ! For example 840 (USA)
# wlanconfig ath0 list chann Channel 1 : 2412 Mhz 11g Channel 48 : 5240 Mhz 11a Dynamic Channel 2 : 2417 Mhz 11g Channel 50 : 5250 Mhz 11a Static Channel 3 : 2422 Mhz 11g Channel 52 : 5260 Mhz 11a Channel 4 : 2427 Mhz 11g Channel 56 : 5280 Mhz 11a Dynamic Channel 5 : 2432 Mhz 11g Channel 58 : 5290 Mhz 11a Static Channel 6 : 2437 Mhz 11g Dynamic Channel 60 : 5300 Mhz 11a Channel 7 : 2442 Mhz 11g Channel 64 : 5320 Mhz 11a Channel 8 : 2447 Mhz 11g Channel 149 : 5745 Mhz 11a Channel 9 : 2452 Mhz 11g Channel 152 : 5760 Mhz 11a Static Channel 10 : 2457 Mhz 11g Channel 153 : 5765 Mhz 11a Dynamic Channel 11 : 2462 Mhz 11g Channel 157 : 5785 Mhz 11a Channel 36 : 5180 Mhz 11a Channel 160 : 5800 Mhz 11a Static Channel 40 : 5200 Mhz 11a Dynamic Channel 161 : 5805 Mhz 11a Dynamic Channel 42 : 5210 Mhz 11a Static Channel 165 : 5825 Mhz 11a Channel 44 : 5220 Mhz 11a
Then to enable/force turbo in master (AP) or ad-hoc mode :
# iwconfig ath0 channel 0 # iwpriv ath0 mode 1 # 11a mode # iwconfig ath0 channel 42 # channel 42 : 5210 Mhz 11a Static turbo # iwconfig ath0 ... # ath0 IEEE 802.11Ta ... # 11a + Turbo enabled (static turbo).
In 11a STA mode the following is also required:
# iwpriv ath0 mode 5
otherwise the STA will never see the AP.
In STA mode, it appears that attempts to set the channel are ignored so
# iwconfig ath0 channel x
is futile - the radio will just scan and lock.