USB device registration

[Ralf Mardorf]

On Sat, 2022-01-29 at 22:28 -0800, rikona wrote:
> Is there a way to just disable one selected port
> on the internal root usb Linux hub on the MB?

It depends on the mobo. It's possible to unbind USB ports and was, maybe
still is done by Linux real time audio users. On an old mobo I did this,
to get rid of an IRQ shared with an audio card. On some mobos you likely
need to unbind way more USB ports, than you want to unbind. IIRC unbind
doesn't really help you, since you can't get information about the
connected device anymore.

I didn't read the below mentioned links, I just glanced through some
random sentences.

This or an earlier version of this howto was likely what I used many
years ago:

"Solve IRQ conflicts by unbinding devices" -
https://wiki.linuxaudio.org/wiki/system_configuration

I don't remember an issue with changing port orders after a restart as
mentioned here:

"Learning how to disable specific USB devices by their ports in Linux" -
http://migueleonardortiz.com.ar/linux/learning-how-to-disable-specific-usb-devices-by-their-ports-in-linux/1645

Other ways, such as powering off a port:

"5 ways to disconnect and connect a USB device without taking your hands
off the keyboard" -
https://blog.desdelinux.net/en/5-ways-to-disconnect-connect-usb-device-without-removing-your-hands-from-the-keyboard/

Maybe the last link provides a way to disable instant access, by still
getting information about a connected device.