MT7620A Wifi still very slow

[dvarkin]

My Archer C20 v1 (22.03.2) has slow wifi.
2.4GHz (40Mhz) is 14 MBit/s, while 5.8GHz (by another router chip) ok.
Old TL-WR740N is ok too (~90 MBit/s 2.4 GHz).
Original firmware, as i remember, was ok too.
The only significant 2.4 wifi errors in log:

Sat Dec 17 10:41:13 2022 kern.err kernel: [   48.998741] rt2880-pinmux pinctrl: pa is already enabled
Sat Dec 17 10:56:45 2022 kern.err kernel: [   51.495537] ieee80211 phy1: rt2800_wait_bbp_rf_ready: Error - BBP/RF register access failed, aborting
Sat Dec 17 10:56:45 2022 kern.warn kernel: [   51.504984] ieee80211 phy1: rt2800_loft_iq_calibration: Warning - RF RX busy in LOFT IQ calibration
Sat Dec 17 10:56:45 2022 kern.err kernel: [   51.687605] ieee80211 phy1: rt2800_wait_bbp_rf_ready: Error - BBP/RF register access failed, aborting
Sat Dec 17 10:56:45 2022 kern.warn kernel: [   51.697054] ieee80211 phy1: rt2800_loft_iq_calibration: Warning - RF RX busy in LOFT IQ calibration
Sat Dec 17 10:56:45 2022 kern.err kernel: [   51.825633] ieee80211 phy1: rt2800_wait_bbp_rf_ready: Error - BBP/RF register access failed, aborting
Sat Dec 17 10:56:45 2022 kern.warn kernel: [   51.835081] ieee80211 phy1: rt2800_rxiq_calibration: Warning - Timeout waiting for MAC status in RXIQ calibration
Sat Dec 17 10:56:45 2022 kern.warn kernel: [   51.896097] ieee80211 phy1: rt2800_rxiq_calibration: Warning - RXIQ calibration FAIL

Is this a driver error or bad settings?

MT7620A Wifi very slow. Is there any driver issue?

Hello, I installed LEDE (https://lede-project.org/toh/hwdata/gl.inet/gl.inet_gl-mt300a) in my new GL-MT300A router. Now it is downloading (from wifi) about 3 times slower than another similar router I have. Do you know if there is any problem with MediaTek MT7620A driver? I have seen a couple of related links: But that was many months ago. Any clue? Thanks a lot.

[lleachii]

@dvarkin

2.4GHz (40Mhz)

Are you in a remote, country or rural location?

@dvarkin

BBP/RF register access failed

@dvarkin

RF RX busy in LOFT IQ calibration

Have you altered other partitions on the device?

@dvarkin

Is this a driver error or bad settings?

Please provide your settings. Please copy the output of the following commands and post it here using the "Preformatted text </> " button:

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

cat /etc/config/network
cat /etc/config/wireless

[dvarkin]

@lleachii

Are you in a remote, country or rural location?

I'm in a big apartment building in the city. There are a lot of neighbors APs here, but almost all of them are 40 MHz, and they don't interfere with my old router, if that's what you're talking about. I can send a screenshot of LinSSID if you are interested. If i changes the channel width to 20 MHz, the speed does not change at all.(PS: but i could see that my laptop was connected by 40MHz channel when AP was 40 MHz) I didn't have any problems with interfere at all with the old router.

@lleachii

Have you altered other partitions on the device?

No, but Archer C20v 1 has an unusual procedure for flashing the OpenWRT firmware. However, I think that the errors in the log mention special-purpose registers of some router chip that's do not relate to Flash.

root@varda:~# cat /etc/config/network

config interface 'loopback'
	option device 'lo'
	option proto 'static'
	option ipaddr '127.0.0.1'
	option netmask '255.0.0.0'

config globals 'globals'
	option ula_prefix 'f***:****:****::/48'

config device
	option name 'br-lan'
	option type 'bridge'
	list ports 'eth0.1'

config interface 'lan'
	option device 'br-lan'
	option proto 'static'
	option ipaddr '192.168.1.1'
	option netmask '255.255.255.0'
	option ip6assign '60'

config interface 'wan'
	option device 'eth0.2'
	option proto 'pppoe'
	option username '****'
	option password '****'
	option ipv6 'auto'

config switch
	option name 'switch0'
	option reset '1'
	option enable_vlan '1'

config switch_vlan
	option device 'switch0'
	option vlan '1'
	option ports '1 2 3 4 6t'

config switch_vlan
	option device 'switch0'
	option vlan '2'
	option ports '0 6t'

config route6
	option interface 'wan_6'
	option target '::/0'
	option source '****:****:***:***::/64'

config wifi-device 'radio0'
	option type 'mac80211'
	option path 'pci0000:00/0000:00:00.0/0000:01:00.0'
	option band '5g'
	option htmode 'VHT80'
	option cell_density '0'
	option country '**'
	option channel '149'
	option disabled '0'

config wifi-iface 'default_radio0'
	option device 'radio0'
	option network 'lan'
	option mode 'ap'
	option ssid '*****_5G'
	option encryption 'sae-mixed'
	option key '********'
	option disabled '0'

config wifi-device 'radio1'
	option type 'mac80211'
	option path 'platform/10180000.wmac'
	option band '2g'
	option htmode 'HT40'
	option cell_density '0'
	option channel 'auto'
	option txpower '14'
	option country '**'

config wifi-iface 'default_radio1'
	option device 'radio1'
	option network 'lan'
	option mode 'ap'
	option ssid '*****'
	option encryption 'sae-mixed'
	option key '********'