Killer(R) Wi-Fi 6 AX1650s 160MHz unstable 5GHz performance

[blazer221]

Have You Read Our Docs
Yes

Are You Reporting A Bug
Yes

Environment

• Kext Version: Airportitwlm 2.2.0 (latest, but also present on 2.1.0 Stable for Monterey).
• WiFi Card Model: Killer(R) Wi-Fi 6 AX1650s 160MHz Wireless Network Adapter (201D2W)
• PCI Product ID: 0x1651 (at least the System Information reports that)
• macOS Version: macOS 13.1

Description
I'm having constant problems with my laptop and the abovementioned WiFi card since day 1. Each time i try to connect to a 5GHz connection i'm having issues, most of the times i cannot connect at all, sometimes i'm connecting to such networks, but very unstable and usually get disconnected shortly. This is an issue with both Airportitlwm and itlwm kexts (with the second one actually i have more success, but again it's very unstable). I'm having this issue since Monterey and now on Ventura. The strange is that i have almost the same configuration, but with AX1650x (prod. id is 0x1654) and it works like a charm, only this one is getting me sick. I've tried many different configurations on my home router also, but it's not only an issue with it, it's with any 5GHz connection (ac/ax, it doesn't matter, have tried all combiations). If i'm connecting to a 2.4GHz connection it works flawlessly and fast. I have checked any documentation, searched in the issues, but didn't find anything useful that can help me. I'm also attaching a log with Airportitlwm used currently. I would be happy if there's a solution for all of this.

EDIT: I forgot to mention that if i add the -novht boot arg it seems to be working much better so it must be something with the 80211ac standard, with the AC disabled it seems to be working moslty fine (although i still cannot connect to some 5GHz ones), but on the AX1650x i have on another configuration, it works fine with the 802.11ac and makes the max up/down bandwidth. Also I didn't find anything about the 802.11ax standard, only it's said it's supported, but disabled for now (i guess very bad support for it, but also no documentation on how to enable it for testing).

**EDIT2: ** Another thing i noticed while playing with AX1650x, but thought it's a global issue, it seems it detects twice as much networks compared to the AX1650s which on Windows detects the correct amount of networks (it's not an antenna or chip issue). Please let me know if you need more information and logs.

Bug Report Archive

itlwm_logs - 20012023.log

Kext Download Source
Latest alpha from Github - AirportItlwm-Ventura-v2.2.0-DEBUG-alpha-e0f745e.zip

[ameenjuz]

I have same issue on 5GHz on Wi-Fi 6 AX201
Each time i try to connect to a 5GHz connection i'm having issues, most of the times i cannot connect at all, sometimes i'm connecting to such networks, but very unstable and usually get disconnected shortly

[Androyd1]

I have same issue on 5GHz on Wi-Fi 6 AX1650s Dell XPS 15 9500

[blazer221]

I'm also with XPS9500, i've tried almost anything that was possible, but even the latest version, which tells there's support added for 1650s nothing has changed much.

[SiddharthManthan]

I have the same card and it works well on sonoma.

Edit: No I have AX1650x (200NGW)