Clients keep disconnecting due to "excessive missing ACKs"

[guisenges]

I've just tested latest commit e504656 with LEDE snapshot version on my TL-WR840N v4 router. I've tested wifi stability using 3 parallel Ubuntu ISO downloads from 3 different laptops and logread messages keeps informing hostapd "IEEE 802.11: disconnected due to excessive missing ACKs". Connection from these 3 laptops often hangs after some of these messages.

Any debug suggestions? My wireless uci config is the following:

config wifi-device 'radio0'
option type 'mac80211'
option channel '11'
option hwmode '11n'
option path 'platform/10300000.wmac'
option htmode 'HT40'
option country 'BR'
option txpower '20'
option disabled '0'

config wifi-iface 'default_radio0'
option device 'radio0'
option network 'lan'
option mode 'ap'
option ssid 'LEDE'
option encryption 'psk2'
option key '1234567890'

TL-WR840N v4 uses MT7628 chipset

[dibg]

I have the same problem with xiaomi nano and lege 17.01.4, any updates?

[karlp]

same on miwifi mini, and snapshot openwrt from LEDE_RELEASE="OpenWrt SNAPSHOT r6380-606cea8"

(client is a macbook, phones seem to be fine, and it's on the 5gig handled by the mt76.

[Zetanova]

For me the same.
With ANI off, it happends frequently.

TP-Link TL-WR1043N/ND v2
LEDE Reboot 17.01.4 r3560-79f57e422d

[nbd168]

Please try the latest version

[Zetanova]

thx, I am testing now on OpenWrt SNAPSHOT r6690-cd7878e
for 24h and there is no issue until now.

Will write in two days again.

[Zetanova]

seams that the problem got resolved.
@nbd168 thx

[Zetanova]

I need to pull back, it only helpt to increade the period.

After a runtime of >7days
2 of 5 router got this problem again