I’m running wpa_supplicant on Alpine Linux 3.15 aarch64 on RPi 4 and it can only scan channels up to 11 in 2.4 GHz range. I deliberately setup a wifi that runs on channel 12 to see, if it will find it and it won’t.

If I run an identical scan on Raspberry Pi OS on the same RPi, it finds it, both on channels 12 and 13. In both cases I set the country to CZ and rebooted the device.

It looks like there must be some difference somewhere in Alpine, that causes it to ignore channels 12 and 13.

If I can get some ideas about what I’m doing wrong, I’ll appreciate it. Thank you!

Michal