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This repository contains pre-compiled binaries of the current Raspberry Pi kernel and modules, userspace libraries, and bootloader/GPU firmware.
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bssid / freq_list not respected in wpa_supplicant.conf (assuming this may be an issue with the kernel wifi driver?) #1596

Open anfractuosity opened 2 years ago

anfractuosity commented 2 years ago

Describe the bug

I set the ssid, bssid, freq_list of my 5GHz AP by doing:

ssid="blah" bssid=.... freq_list=5220

In my wpa_supplicant.conf

However, the Pi 4B, will at some point fallback from the 5GHz connection to my 2.4GHz AP, even though it has a different bssid and frequency.

(I have also tried removing the ssid and leaving just the bssid, but then it didn't connect at all)

I found other people having the same issue - https://raspberrypi.stackexchange.com/questions/116486/choose-a-specific-wifi-ap-or-frequency however the freq_list parameter doesn't prevent the wifi changing to a different bssid / frequency for me.

Expected behaviour

I would expect after specifying the bssid that the Pi would not connect to alternative bssids.

Actual behaviour

Alternative bssids are connected to, than the one specified in wpa_supplicant.conf

System

Raspberry Pi 4 Model B Rev 1.2 PRETTY_NAME="Raspbian GNU/Linux 10 (buster)" NAME="Raspbian GNU/Linux" VERSION_ID="10" VERSION="10 (buster)"

kwinz commented 2 years ago

I have the same issue. freq_list option in wpa_supplicant.conf seems to be ignored.

bpsib commented 1 year ago

My guess is that this is something to do with firmware roaming support. It can be turned off by creating /etc/modprobe.d/brcmfmac.conf and add the following: options brcmfmac roamoff=1

I haven't had chance to try this myself so let me know if this fixes the issue.

lobstaj commented 1 year ago

My guess is that this is something to do with firmware roaming support. It can be turned off by creating /etc/modprobe.d/brcmfmac.conf and add the following: options brcmfmac roamoff=1

I haven't had chance to try this myself so let me know if this fixes the issue.

This works like a charm, thank you very much!

anfractuosity commented 11 months ago

I've just been testing setting bssid again recently in wpa_supplicant, using the latest kernel/raspberry pi OS.

Even without roamoff=1, it seems to be currently sticking to the 5GHz channel for me.

Will keep my eye on it, to see if it ever changes.

milux commented 11 months ago

My guess is that this is something to do with firmware roaming support. It can be turned off by creating /etc/modprobe.d/brcmfmac.conf and add the following: options brcmfmac roamoff=1

I haven't had chance to try this myself so let me know if this fixes the issue.

Negative for me. :disappointed:

bpsib commented 11 months ago

Negative for me. 😞

@milux Did you reboot? It didn't work for me until I rebooted.

milux commented 11 months ago

Negative for me. 😞

@milux Did you reboot? It didn't work for me until I rebooted.

Of course I did. I'm aware of the fact that changes to kernel module parameters generally require a reboot to take effect. :wink: I tried to force the WiFi module to stick with 5 GHz in client configuration, and failed multiple times.

Meanwhile, I simply accepted that the driver(s) are too buggy to reliably setup WiFi client and WiFi AP via the same network interface, and ordered a separate USB WiFi dongle. :shrug: