Topic: Unable to change TX power on WNDR3700
I've installed Backfire 10.03.1-rc2 and got both 2.4GHz and 5GHz bands working out of the box. I tried to use the GUI to change the TX power resulting in the following additional line in my /etc/config/wireless for wlan0 for example:
option 'txpower' '23'
But when I run the 'wifi' command I get:
root@OpenWrt:~# wifi Error for wireless request "Set Tx Power" (8B26) : SET failed on device wlan0 ; Invalid argument.
Also I'm unable to get the maximum supported power using the following command:
root@OpenWrt:~# iwlist wlan0 txpower wlan0 unknown transmit-power information.
Another strange observation is the iwconfig output where 18dBm and 30dBm show up!
wlan0 IEEE 802.11bgn Mode:Master Frequency:2.442 GHz Tx-Power=18 dBm RTS thr:off Fragment thr:off Power Management:off wlan1 IEEE 802.11an Mode:Master Frequency:5.805 GHz Tx-Power=30 dBm RTS thr:off Fragment thr:off Power Management:off
When I bought my WNDR-3700 two days ago, I flashed it with DD-WRT and the "iwmlist wlan0 txpower" command would report 23dm max for both bands. I was also able to change the TX power up to this maximum.
Is this a limitation of the current driver? Is the reported TX power correct?