Archer C2: 2.4GHz (MT7620) support is broken

lleachii · May 10, 2018, 5:38pm

See:

https://bugs.openwrt.org/index.php?do=details&task_id=152 (especially this one)

github.com/openwrt/openwrt

FS#896 - mt7620 - dropping frames (WiFi)

opened 08:27PM - 07 Jul 17 UTC

closed 06:30PM - 14 Nov 19 UTC

openwrt-bot

flyspray

*drut:* Device: Nexx WT3020 (MT7620) LEDE release: LEDE Reboot 17.01-SNAPSHOT …r3435-65eec8b Latest LEDE on Nexx WT3020 with MT7620 is getting syslog spammed with: <code>ieee80211 phy0: rt2x00queue_write_tx_frame: Error - Dropping frame due to full tx queue 2</code> It usually occurs with high-bandwidth usage of WiFi client (Android i.e.) and results with need to reboot router (or WiFi won't even work for devices - it's seen but unable to connect). <code># cat /etc/config/wireless config wifi-device 'radio0' option type 'mac80211' option hwmode '11g' option path 'platform/10180000.wmac' option country 'PL' option disabled '0' option htmode 'HT40' option distance '3' option txpower '20' option channel '6' config wifi-iface option device 'radio0' option mode 'ap' option ssid 'xxx' option network 'lan' option encryption 'psk2+ccmp' option key 'xxx'</code> Also it's connected with the issue of android devices loosing connectivity/dropping wifi even 1 meter next to router: <code>Fri Jul 7 00:32:11 2017 daemon.info hostapd: wlan0: STA xx:xx:xx:xx:xx:xx IEEE 802.11: authenticated Fri Jul 7 00:32:11 2017 daemon.info hostapd: wlan0: STA xx:xx:xx:xx:xx:xx IEEE 802.11: associated (aid 2) Fri Jul 7 00:32:11 2017 daemon.notice hostapd: wlan0: AP-STA-CONNECTED xx:xx:xx:xx:xx:xx Fri Jul 7 00:32:11 2017 daemon.info hostapd: wlan0: STA xx:xx:xx:xx:xx:xx WPA: pairwise key handshake completed (RSN) Fri Jul 7 00:32:51 2017 daemon.info hostapd: wlan0: STA xx:xx:xx:xx:xx:xx IEEE 802.11: disconnected due to excessive missing ACKs Fri Jul 7 00:32:51 2017 daemon.notice hostapd: wlan0: AP-STA-DISCONNECTED xx:xx:xx:xx:xx:xx Fri Jul 7 00:32:55 2017 daemon.info hostapd: wlan0: STA xx:xx:xx:xx:xx:xx IEEE 802.11: authenticated Fri Jul 7 00:32:55 2017 daemon.info hostapd: wlan0: STA xx:xx:xx:xx:xx:xx IEEE 802.11: associated (aid 2) Fri Jul 7 00:32:55 2017 daemon.notice hostapd: wlan0: AP-STA-CONNECTED xx:xx:xx:xx:xx:xx Fri Jul 7 00:32:55 2017 daemon.info hostapd: wlan0: STA xx:xx:xx:xx:xx:xx WPA: pairwise key handshake completed (RSN)</code>

http://lists.infradead.org/pipermail/lede-bugs/2016-September/000607.html

and

Hope this helps.