Slow 2.4Ghz wifi on Netgear R7800

Installing and Using OpenWrt Network and Wireless Configuration
1

I have set up a Netgear R7800 router on openwrt 21.02.3.
It is in bridge mode, behind the ISP router.
When I enable the ISP's router 2.4Ghz wifi, I get speeds of 95 Mbps (close to the 100 Mbps I am paying for).

On the openwrt router (R7800), the 5GHz wifi is perfectly fine. However, the 2.4GHz wifi is very slow. I achieve about 20 Mbps, sometimes dipping to 15 Mbps.

Can anyone with the R7800 share their experience with 2.4GHz speed ?

Here's my /etc/config/wireless (the 2.4Ghz part) :

config wifi-device 'radio1'
	option type 'mac80211'
	option band '2g'
	option path REDACTED
	option htmode 'VHT20'
	option cell_density '0'
	option channel 'auto'

config wifi-iface 'radio1_net'
	option device 'radio1'
	option network 'net'
	option mode 'ap'
	option key REDACTED
	option ssid 'net'
	option encryption 'sae'
	option wpa_disable_eapol_key_retries '1'
	option ieee80211w '1'
	option isolate '1'
	option dtim_period '3'
2

Try setting a channel, instead of using auto.
Have you set a country?

3

I tried setting the optimal channel, but it didn't make a difference.
I let it at the default US.

4

If there's no problem with the wifi coverage then try these settings:
image

Then in advanced

image
image807×77 3.71 KB

leave DTIM Interval to default 2

1 Like
5

Thank you. I just tried, but it didn't help.

6

set to 40 mhz not 20

7

Thanks, but I already tried that, and it didn't work.

8

Hi all,

I am still struggling with this, and reaching much lower speed on 2.4 Ghz than on 5 Ghz.

I can reach a max of 60 Mbs on 2.4 Ghz, in optimal conditions, versus an easy 110 Mbs on 5 Ghz.

Is anyone able to get faster performance than 60 Mbs download with this device ?

9

MHz ... ???

10

Sorry, I meant Mbs. I will correct that now.

11

In case anyone looks at this, it seems the wifi driver from Candela Technologies is the culprit.

Replacing the packages:

ath10k-firmware-qca9984-ct and kmod-ath10k-ct by their non -ct versions ath10k-firmware-qca9984 and kmod-ath10k will fix the problems, and download speed will go from 15Mbps to 90Mbps.

12

This topic was automatically closed 10 days after the last reply. New replies are no longer allowed.