On Friday, December 02, 2011 15:31:43 Felix Fietkau wrote: > > when I upgraded my trunk to a fairly recent version (rev. 29333) I > > noticed wifi became practically unusable on my AR9285 device. I spend a > > good deal of the day bisecting the recent ath9k changes to identify the > > culprit: 43c3528430bd29f5e5243. I tried verious things like setting the > > antenna / removing the "iw antenna all all" call from the ath9k script / > > etc but I could not make it work. Only reverting the patch makes wifi > > usuable again. > > Did you also try iw phy0 antenna 1 2?
That did not work at all (just tested with r29397): iw phy phy0 set antenna 1 2 command failed: Invalid argument (-22) Maybe the command is incomplete ? > > Besides, I don't quite get the idea behind "all all" - there a lot of > > devices out there that support more antennas than they use: the OM2P is > > a 1x2 with one antenna, the bullet is 2x2 with one antenna, etc. Can > > somebody shed some light on this ? > > The chip supports more than what is connected on the route, normally the > EEPROM capabilities force the driver to use only what's on the board, > but sometimes the manufacturer puts in stupid values and 'fixes' it with > software hackery instead. I am not entirely sure what you are referring to with "software hackery". Standard OpenWrt trunk without _any_ modifications does not work. Simply reverting 43c3528430bd fixes it. This tells me that whatever the driver was doing before was correct. The EEPROM seems correct too? Could be wrong though - I am no EEPROM specialist. ;-) Having an option to choose the antenna is a good thing as long as the default values keep working. In the driver as well as in OpenWrt. > Does the O2MP have a second antenna port, or a PCB antenna or something > like that? No, although the AR9285 is a 1x2 device only one antenna port is wired. Nothing on the board or anything. By the way, this is common practice - just look at the Ubiquiti devices ... Regards, Marek _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
