[FS#4064] high latency / no packet transmitted on WRT1900ACS (88W8864)

OpenWrt Bugs openwrt-bugs at lists.openwrt.org
Wed Oct 6 05:20:41 PDT 2021


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

User who did this - zorxd (zorxd) 

Attached to Project - OpenWrt/LEDE Project
Summary - high latency / no packet transmitted on WRT1900ACS (88W8864)
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Basse
Priority - Très Basse
Reported Version - openwrt-21.02
Due in Version - Undecided
Due Date - Undecided
Details - Hi

On Linksys WRT1900ACS (and possibly other devices using marvel 88W8864 WiFi), WiFi connectivity is intermittently unreliable. On my Galaxy S10e smartphone, the symptom is that the device reports being connected to WiFi, but when trying to load a web page, it takes forever. The device switches to cellular connectivity after some time, and reconnect to WiFi (possibly on the other band) and then it works for a while.

As a couple users have reported, it is necessary to disable TX AMSDU to fix this bug.
This can be accomplished by issuing the following commands:

echo 0 > /sys/kernel/debug/ieee80211/phy1/mwlwifi/tx_amsdu
echo 0 > /sys/kernel/debug/ieee80211/phy0/mwlwifi/tx_amsdu

This should be done by default.

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