Intel AX200 unstable connection

[PRRS1927]

I have tried the default and lts kernel of cachyos. I have tried disabling powersave mode and added the line below to /etc/NetworkManager/conf.d/wifi-powersave.conf:
[connection]
wifi.powersave = 2

Then I tried adding the lines below to /etc/modprobe.d/iwlwifi.conf:
options iwlwifi power_save=0
options iwlwifi swcrypto=1
options iwlwifi 11n_disable=8

Nothing worked. Let me describe the issue: The wifi speed sometimes goes up to 80-90mbps (which is what I expect), but then it goes down to very slow speeds (under 10mbps). It’s unstable and I can’t properly play online games, browse internet, download things etc.

[Sunda-Spirit]

There’s another thread about this, but it’s unresolved.

Wifi issues with Intel AX200 adapter

Hello, I am complete novice in Linux ecosystem. Although I consider myself computer savvy person. I tried Zorin OS for a month and switched to CachyOS just yesterday. Wifi experience wasnt easy, first of all KDE Wallet issues, which I managed to disable/solve. Current issues: Wifi on 2.4G works ok, but sometimes disconnects (hence, very short trial period. It also feels like the speeds are lower than they could be. Wifi on 5G won’t work at all, unable to connect. My router is Technico…

[Steeledpick]

Switch NetworkManager’s Wi-Fi backend to iwd
This is one of the most reported fixes for AX200 dropouts and instability on Arch-based distros.

Install iwd if not present:
sudo pacman -S iwd
Edit /etc/NetworkManager/conf.d/wifi_backend.conf:

[device]
wifi.backend=iwd

Restart network manager:

sudo systemctl restart NetworkManager

reconnect to network

Many users (including on Framework laptops and desktops with AX200) report this immediately stabilizes speeds and prevents fluctuations

[PRRS1927]

I didn’t change the /etc/NetworkManager/conf.d/wifi-powersave.confand it has this value:
[connection]
wifi.powersave = 2

And changed /etc/modprobe.d/iwlwifi.conf to:
options iwlwifi power_save=0 11n_disable=8

Then rebuild initramfs and reboot:

sudo mkinitcpio -P
sudo reboot

I think it somewhat solved the issue or at least something else did (maybe some update or something else) and now I get better and more stable speeds (still inferior to speed in windows, but at least acceptable)