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From: druck <news@druck.org.uk>
Newsgroups: comp.sys.raspberry-pi
Subject: Re: USB enumeration changes when it shouldn't
Date: Wed, 30 Oct 2024 21:22:31 +0000
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On 30/10/2024 16:42, bp@www.zefox.net wrote:
> [continuation of wifi problems on Bookworm]
> 
> In tinkering with a usb-wifi dongle on a Pi5 running Bookworm
> it appears that adding or removing the usb-wifi dongle changes
> device names in a surprising way:
> 
> When booted with no dongle, the internal wifi is wlan0, as expected.
> When booted with the dongle, the internal wifi is wlan1 and the dongle
> is wlan0, a surprise.
> 
> I expected that devices would be given enumeration in order of discovery.
> 
> Is this behavior normal?

Yes, the usual reason for adding a WiFi dongle is to use it in 
preference to the built-in interface.

If you don't want that; run raspi-config and select predictable names in 
networking. Each interface will then have a consistent and unique name.

---druck