Hello. I got couple of wifi cards, rtl8187 and dreaded Alfa NHA.
Ok, at the beginning both cards were fixed to 20dbm max.
So, i followed this guide http://blog.binaryfactory.ca/2012/09...r-card-can-go/ and my cards now display 30dbm.
BUT i cannot go LOWER, or adjust txpower at all now.
I remember i could some time ago, but after some time and dist-upgrade i cannot.
Behavior:
iwconfig wlan0 = Tx Power 30dbm
$ iwconfig wlan0 txpower 20dbm (or just 20) = no error, but Tx Power stays at 30dbm.
Both cards - same behavior.
Have old BT5R3 image - booted it up, txpower changes without any problems.
Any help will be appreciated. Cards tx-ing at 30dbm eat my laptop battery in an hour.
Thanks