Unable to connect to WiFi on 5Ghz

[sykogee]

While using my Recalbox (8.0) on a RPi 4B. I noticed it is unable to see or connect to my WiFi on 5Ghz.
It can see 2.4Ghz no problem and connect fine.
I tried to manually enter the 5Ghz WiFi name, but it wont connect.
After some digging about, I have updated the WiFi region in the recalbox.conf, it was set to JP, I have updated it to GB and US.
Both rebooting each time, but still unable see any 5Ghz networks or able to connect when manually entered.

After a bit of testing if I manually set the 5Ghz channel to 48, the recalbox is able to see and connect to the network.
However on channel 48 there are a lot of overlapping 5Ghz networks so performance is poor. The router auto sets the channel to 108.
Is there a setting I need to change in Recalbox for it to be able to see and connect to the 5Ghz using channels higher than 48?

[Zing]

@sykogee See if this helps:
https://forums.raspberrypi.com/viewtopic.php?t=268222

[sykogee]

@zing Thanks for the link, unfortunately the issue was that they had not set the WiFI region code.

The default setting for the recalbox.conf Wifi region is JP which would explain the issue with the high channels not being seen. I have previously updated the Wifi Region section of the recalbox.conf to be GB & US, but its still not able to connect to the 5Ghz Wifi higher than channel 48

As a further test I created another SD card with RetroPie on and was able to go straight in and change the Wifi region then in the scanned networks I was able to see my 5Ghz network (currently on channel 108)
Also in Rpi OS lite - it can detect my 5Gz network before I have gone into raspi-conf to change the Wifi region.
It just seems the is an issue with recalbox in seeing 5Ghz networks on channels higher than 48

Is there anywhere else I need to update the configuration or the Wifi region?

[Zing]

@sykogee Sorry, but I'm not a developer and I don't know how to solve this problem.

I recommend that you open an issue detailing the bug as you did here, and reference this topic.

To open an issue go to:
https://gitlab.com/recalbox/recalbox/-/issues

[sykogee]

@zing Thanks for you help, not a problem, as you suggested I have raised a Issue on Gitlab, hopefully they will find a solution to go into the next version / update.

Cheers