[FS#1375] Phicomm PSG1218 rev.Ax(Phicomm K2)Wireless can not connect

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - daiaji (daiaji) 

Attached to Project - OpenWrt/LEDE Project
Summary - Phicomm PSG1218 rev.Ax(Phicomm K2)Wireless can not connect
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - 严重
Priority - 普通
Reported Version - lede-17.01
Due in Version - Undecided
Due Date - Undecided
Details - When I used the Moto XT1085 to connect to my wireless, the XT1085 typically disconnected the wireless connection within one or two seconds after I got the IP address, and I got the syslog
Mon Feb 19 09:04:02 2018 daemon.info hostapd: wlan1: STA 38:a4:ed:db:3c:6c IEEE 802.11: authenticated
Mon Feb 19 09:04:02 2018 daemon.info hostapd: wlan1: STA 38:a4:ed:db:3c:6c IEEE 802.11: associated (aid 1)
Mon Feb 19 09:04:02 2018 daemon.notice hostapd: wlan1: AP-STA-CONNECTED 38:a4:ed:db:3c:6c
Mon Feb 19 09:04:02 2018 daemon.info dnsmasq-dhcp[1413]: DHCPDISCOVER(br-lan) 38:a4:ed:db:3c:6c
Mon Feb 19 09:04:02 2018 daemon.info dnsmasq-dhcp[1413]: DHCPOFFER(br-lan) 192.168.1.152 38:a4:ed:db:3c:6c
Mon Feb 19 09:04:02 2018 daemon.info dnsmasq-dhcp[1413]: DHCPREQUEST(br-lan) 192.168.1.152 38:a4:ed:db:3c:6c
Mon Feb 19 09:04:02 2018 daemon.info dnsmasq-dhcp[1413]: DHCPACK(br-lan) 192.168.1.152 38:a4:ed:db:3c:6c android-a222c0967a127f80
Mon Feb 19 09:04:05 2018 daemon.notice hostapd: wlan1: AP-STA-DISCONNECTED 38:a4:ed:db:3c:6c
This does not seem to have any useful information

So I try to use my moto x ghost to connect wireless, although also disconnected the wireless connection, but I got a different syslog
Mon Feb 19 09:18:32 2018 daemon.info hostapd: wlan1: STA f8:cf:c5:bc:7d:17 IEEE 802.11: disassociated
Mon Feb 19 09:18:33 2018 daemon.info hostapd: wlan1: STA f8:cf:c5:bc:7d:17 IEEE 802.11: deauthenticated due to inactivity (timer DEAUTH/REMOVE)
Mon Feb 19 09:18:34 2018 daemon.info hostapd: wlan1: STA f8:cf:c5:bc:7d:17 IEEE 802.11: authenticated
Mon Feb 19 09:18:34 2018 daemon.info hostapd: wlan1: STA f8:cf:c5:bc:7d:17 IEEE 802.11: associated (aid 1)
Mon Feb 19 09:18:34 2018 daemon.notice hostapd: wlan1: AP-STA-CONNECTED f8:cf:c5:bc:7d:17
Mon Feb 19 09:18:34 2018 daemon.info dnsmasq-dhcp[1413]: DHCPDISCOVER(br-lan) f8:cf:c5:bc:7d:17
Mon Feb 19 09:18:34 2018 daemon.info dnsmasq-dhcp[1413]: DHCPOFFER(br-lan) 192.168.1.150 f8:cf:c5:bc:7d:17
Mon Feb 19 09:18:34 2018 daemon.info dnsmasq-dhcp[1413]: DHCPREQUEST(br-lan) 192.168.1.150 f8:cf:c5:bc:7d:17
Mon Feb 19 09:18:34 2018 daemon.info dnsmasq-dhcp[1413]: DHCPACK(br-lan) 192.168.1.150 f8:cf:c5:bc:7d:17 android-e221edb7e67bd21f
Mon Feb 19 09:18:37 2018 daemon.notice hostapd: wlan1: AP-STA-DISCONNECTED f8:cf:c5:bc:7d:17
Mon Feb 19 09:18:33 2018 daemon.info hostapd: wlan1: STA f8:cf:c5:bc:7d:17 IEEE 802.11: deauthenticated due to inactivity (timer DEAUTH/REMOVE)
This looks interesting

I got the solution after google
uci set wireless. at wifi-iface[0].disassoc_low_ack=‘0’ && uci commit && reboot
After that I can use the XT1085 to connect wirelessly and get this syslog
Mon Feb 19 09:32:45 2018 daemon.info hostapd: wlan1: STA 44:80:eb:cb:e5:88 IEEE 802.11: authenticated
Mon Feb 19 09:32:46 2018 daemon.info hostapd: wlan1: STA 44:80:eb:cb:e5:88 IEEE 802.11: associated (aid 3)
Mon Feb 19 09:32:46 2018 daemon.notice hostapd: wlan1: AP-STA-CONNECTED 44:80:eb:cb:e5:88
Mon Feb 19 09:32:49 2018 daemon.info dnsmasq-dhcp[1413]: DHCPDISCOVER(br-lan) 44:80:eb:cb:e5:88
Mon Feb 19 09:32:49 2018 daemon.info dnsmasq-dhcp[1413]: DHCPOFFER(br-lan) 192.168.1.115 44:80:eb:cb:e5:88
Mon Feb 19 09:32:49 2018 daemon.info dnsmasq-dhcp[1413]: DHCPREQUEST(br-lan) 192.168.1.115 44:80:eb:cb:e5:88
Mon Feb 19 09:32:49 2018 daemon.info dnsmasq-dhcp[1413]: DHCPACK(br-lan) 192.168.1.115 44:80:eb:cb:e5:88 android-8e596bd7d2f79888
This really works, but does that happen on other MT7620 routers?

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1375