Low Wifi Speed after Installing Fedora - Intel 6E AX211

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Heya y’all, a few weeks ago I made the switch to dual boot fedora and windows 11, and for the most part it’s been a fun experience, except for the wifi. On my (still active) windows install, my phone, and my tablet, speedtest.net records about 100-200 Mbps on the same wifi within inches of each other, but on fedora I am lucky to get over 5 Mbps download and 2 Mbps upload. I am on fedora 37, Kernel 6.1.12-200.fc37.x86_64, this has been happening since I first installed, with I believe 6.1.9 or 6.1.8, and the command

$ lspci -k -n -n | grep -i -A 3 -e net

gives back this.

0000:00:14.3 Network controller [0280]: Intel Corporation Alder Lake-P PCH CNVi WiFi [8086:51f0] (rev 01)
        DeviceName: Onboard - Ethernet
        Subsystem: Intel Corporation Wi-Fi 6E AX211 160MHz [8086:4090]
        Kernel driver in use: iwlwifi
        Kernel modules: iwlwifi

I do not have control over my router. If there is any other information you need, please let me know.

2

Intel doesn’t say the chipset would be supported.

https://www.intel.co.uk/content/www/uk/en/support/articles/000005511/wireless.html

If you have a look at https://linux-hardware.org/?id=pci:8086-2725-8086-0024, you’ll see that there is still a lot of problems reported. Though, I can’t find you model 8086:4090

Have a look at https://discussion.fedoraproject.org/t/intel-ax211-old-iwlwifi-driver-loading/77550/12 to find out how to create a hw probe.

Finally, I guess you just have to wait a bit for another firmware to be released…

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3

Thank you! I made a hw probe and yeah I suppose its just a waiting game at this point.

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I see hw probes at https://linux-hardware.org/?id=pci:8086-51f0-8086-4090&page=1#status, but the probes don’t tell us how well the wifi works. You will want to compare linux wifi details with Windows and/or and older linux kernel

  • Collect some data – see man 7 nmcli-examples. doas nmcli dev wifi list shows BSSID’s, speeds, and channels.

  • check for wifi issues using journalctl. Some users (myslef included) see a lot of disconnects, switching channels or AP’s with 6.1 kernels that didn’t occur with

  • Do you use 5Ghz wifi?

  • does performance increase when linux is booted from power-off?

  • Does your BIOS offer PXE boot options? Some systems activate wifi early to allow PXE booting (useful for big server farms, but also student labs).