[rt2x00-users] rt2800usb / RT3070L: setting txpower has no effect

[gabs]

Roland Koebler <rk-list at ...> writes:

> Do you have any hints how to do this? It would also be ok for me if I have
> to patch the driver specifically for my device -- but since I don't know
> the driver code, I don't know where to start. :(  And I know that the
> driver could set the real transmit power, since the really transmitted
> power changed (to about 1/4..1/3) from rt2x00 version 3.3 to 3.5...
> Any help/hints would be appreciated.
> 
> best regards
> Roland

I have an RT5370 and a high power RT3070 device. Both were tested with kernel
3.3.4 and compat-wireless-2012-05-10. Transmit power levels were measured using
a laptop a few meters away running in monitor mode, then compared when using the
Ralink Windows XP driver.

RT3070, 3.3.4: same with XP
RT3070, compat-wireless: ~10 dB lower

RT5370, 3.3.4: ~10 dB lower
RT5370, compat-wireless: ~10 dB lower

The MAX_G_TXPOWER patch allowed txpower settings other than 0 dBm but the actual
power does not change.