SSID disappears following ath10k TX rate code error

Installing and Using OpenWrt
1

Hi,

I'm having an issue where the wifi kicks all connected devices and then the SSID completely disappears - including from any other devices. It happens irregularly and without apparent cause.

Each time in the router logs, 21s before devices are all disconnected, I note there is a ath10k rate code message, see example below.

Note this is distinct from the common missing ACKs issue, as nothing can reconnect here until a reboot. I think this missing ACK line is a symptom.

The hardware makes use of the Habanero board, with the IPQ4019 SoC, with
Linux version 5.10.176 (builder@buildhost) (arm-openwrt-linux-muslgnueabi-gcc (OpenWrt GCC 11.2.0 r20134-5f15225c1e) 11.2.0, GNU ld (GNU Binutils) 2.37)

ath10k details: ath10k_ahb a000000.wifi: firmware ver 10.4b-ct-4019-fW-13-5ae337bb1

Fri Sep 13 09:27:20 2024 kern.warn kernel: [ 1416.899025] ath10k_ahb a000000.wifi: wmi: fixing invalid VHT TX rate code 0xff
Fri Sep 13 09:27:41 2024 daemon.info hostapd: wlan0: STA <MAC address>:4f IEEE 802.11: disconnected due to excessive missing ACKs
Fri Sep 13 09:27:41 2024 daemon.notice hostapd: wlan0: AP-STA-DISCONNECTED <MAC address>::4f
Fri Sep 13 09:27:41 2024 daemon.info hostapd: wlan0: STA <MAC address>::a4 IEEE 802.11: disconnected due to excessive missing ACKs
Fri Sep 13 09:27:41 2024 daemon.notice hostapd: wlan0: AP-STA-DISCONNECTED <MAC address>::a4
Fri Sep 13 09:27:41 2024 daemon.info hostapd: wlan0: STA <MAC address>::bc IEEE 802.11: disconnected due to excessive missing ACKs

Any ideas?

2

Please connect to your OpenWRT device using ssh and copy the output of the following commands and post it here using the "Preformatted text </> " button:

Remember to redact keys, passwords, MAC addresses and any public IP addresses you may have:

ubus call system board
1 Like
3

Thanks for the reply! Output as follows:

root@OpenWrt:~# ubus call system board
{
	"kernel": "5.10.176",
	"hostname": "OpenWrt",
	"system": "ARMv7 Processor rev 5 (v7l)",
	"model": "8devices Habanero DVK",
	"board_name": "8dev,habanero-dvk",
	"rootfs_type": "squashfs",
	"release": {
		"distribution": "OpenWrt",
		"version": "22.03.5",
		"revision": "r20134-5f15225c1e",
		"target": "ipq40xx/generic",
		"description": "OpenWrt 22.03.5 r20134-5f15225c1e"
	}
}
4

Upgrade to 23.05.4 and repeat tests. V22 is no longer updated.

5

Thanks for the suggestion @brada4. Seems we can't upgrade to V23 right now, apparently it has bricked a small proportion of Habaneros in the past here and can't risk it.

If anyone else had this on V22 and had some workaround, it would be great to hear about.

6

You can swap ct to non-ct or vice versa kmod and firmware,