Wifi Log: iw phy phy0 set antenna all all

Klingon · November 13, 2018, 7:43am

Hi,

Running OpenWrt SNAPSHOT r8430-4d5b0ef in my Archer C2600, checking logs I could see:


Mon Nov 12 18:18:14 2018 user.notice mac80211: Failed command: iw phy phy0 set antenna all all
Mon Nov 12 18:18:14 2018 daemon.notice netifd: radio0 (660): command failed: Not supported (-95)
Mon Nov 12 18:18:14 2018 user.notice mac80211: Failed command: iw phy phy0 set distance 0
Mon Nov 12 18:18:15 2018 user.notice mac80211: Failed command: iw phy phy1 set antenna all all
Mon Nov 12 18:18:15 2018 daemon.notice netifd: radio1 (661): command failed: Not supported (-95)
Mon Nov 12 18:18:15 2018 user.notice mac80211: Failed command: iw phy phy1 set distance 0
Mon Nov 12 18:18:15 2018 daemon.err hostapd: Configuration file: /var/run/hostapd-phy1.conf
Mon Nov 12 18:18:15 2018 daemon.err hostapd: Configuration file: /var/run/hostapd-phy0.conf

Wifi is working fine, but, any idea what's about this "failed" log?

Many Thanks,

mk24 · November 12, 2018, 8:14pm

Antenna selection is generally not supported on MIMO devices. MIMO has fully independent signal processing which always works in parallel on all the antennas.

Klingon · November 13, 2018, 10:36am

And why is trying to do it? It's a bug? Can I disable it in some way?

mk24 · November 13, 2018, 1:15pm

If there are antenna settings in /etc/config/wireless, you should remove them.

Otherwise don't worry about it. It is only a warning not a fatal error.

Klingon · November 13, 2018, 3:05pm

Nothing in the wireless config file.
Thanks @mk24 for your help.

adrianschmutzler · May 20, 2019, 3:28pm

The relevant code is found here:

github.com

openwrt/openwrt/blob/b3d8b3ab8e6fc0c0355f0680fc1c5f9c90a0c35a/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh#L795


		for file in /sys/kernel/debug/ieee80211/$phy/ath9k/chanbw /sys/kernel/debug/ieee80211/$phy/ath5k/bwmode; do
			[ -f "$file" ] && echo "$chanbw" > "$file"
		done
	}


	set_default rxantenna 0xffffffff
	set_default txantenna 0xffffffff
	set_default distance 0
	set_default antenna_gain 0


	[ "$txantenna" = "all" ] && txantenna=0xffffffff
	[ "$rxantenna" = "all" ] && rxantenna=0xffffffff


	iw phy "$phy" set antenna $txantenna $rxantenna >/dev/null 2>&1
	iw phy "$phy" set antenna_gain $antenna_gain
	iw phy "$phy" set distance "$distance"


	[ -n "$frag" ] && iw phy "$phy" set frag "${frag%%.*}"
	[ -n "$rts" ] && iw phy "$phy" set rts "${rts%%.*}"


	has_ap=

The initial value "all" is replaced by 0xffffffff, and this is not an acceptable value for all devices.

Haven't got an idea how to fix this, though.

mk24 · May 20, 2019, 7:59pm

As I understand it, the antenna setting is a bitmap. The setting of all ones means by default use all existing antennas. If some bit is set to zero, the driver will not use that antenna.

On some device where a setting of all ones is not proper, wouldn't you just put the appropriate rxantenna or txantenna setting in /etc/config/wireless?