2,4GHz wifi does not work or slow

General system Kernel, boot, graphics & hardware
1

Hi,

I have both 5GHz and 2,4GHz wifi networks configured at home (same router, different SSID). I can connect to 5GHz without any issues with my laptop running eos, but I cannot connect to 2,4GHz network unless I use:

options iwlwifi 11n_disable=1
in /etc/modprobe.d/iwlwifi.conf

However, when I do this, the speed for both networks is slow (20Mbps vs. 160Mbps download speed for 5GHz).

Is this slowdown a general byproduct of using 11n_disable=1 or is it possible to somehow make my computer use 2.4GHz without speed sacrifice for 5GHz network?

Thanks

2

What wifi speed standards do your router and your computer support?

Also, are you using the router in a place where there are several other wifi routers nearby?

3

I apologize for delayed answer:

  • laptop: Intel Dual Band Wireless-AC 7265 supports 802.11ac standard
  • same goes for my router: TP-link Archer 6

In fact, I was running both 2.4GHz and 5GHz nework on this laptop before running windows 10, so I don’t believe it’s the hardware issue

4

Can you show the output of this command:

inxi -Nza
5

[brhlik@noutbuk-linux ~]$ inxi -Nza
Network:
Device-1: Intel Ethernet I218-LM vendor: Lenovo driver: e1000e v: kernel
port: 3080 bus-ID: 00:19.0 chip-ID: 8086:15a2 class-ID: 0200
Device-2: Intel Wireless 7265 driver: iwlwifi v: kernel pcie: gen: 1
speed: 2.5 GT/s lanes: 1 bus-ID: 03:00.0 chip-ID: 8086:095b class-ID: 0280
Device-3: Intel Bluetooth wireless interface driver: btusb type: USB
rev: 2.0 speed: 12 Mb/s lanes: 1 mode: 1.1 bus-ID: 2-7:4 chip-ID: 8087:0a2a
class-ID: e001

6

Have you seen this: https://wiki.archlinux.org/title/Network_configuration/Wireless
Maybe the troubleshooting sections help.

1 Like
7

I was able to finally solve this issue by using iwd as the Wi-Fi backend:
https://wiki.archlinux.org/title/NetworkManager#Using_iwd_as_the_Wi-Fi_backend

  1. edit:
    /etc/NetworkManager/conf.d/wifi_backend.conf:

    [device] wifi.backend=iwd

  2. restart NetworkManager service (sudo systemctl restart NetworkManager.service)

After these steps, both my 2.4GHz and 5GHz networks are working as expected without the need to 11n_disable=1

Thanks!

2 Likes
8

Great that you got it working! :+1:

9

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