Re: Wifi error log for Bookworm?

On 28/10/2024 18:54, bp@www.zefox.net wrote:

At that point the Pi5 appears to start scanning 5 GHz access points,
despite being told otherwise in /etc/NetworkManager/NetworkManager.conf .
That looks to me like a software problem.

This is why I wasn't happy about Raspbian moving from dhcpcd to Network Manager. Quite often my Linux Laptops which use Network Manager decide they would like to try WiFi networks other than the one I've chosen, that's easily fixed via the gui, but not what you want on headless systems.
You could try disabling the NetworkManager service, and reinstalling dhcpcd so the WiFi is only selected by the contents of the wpa_supplicant.conf file. It worked fine for everything before Bookworm.
---druck