Re: Laptop as KVM to access RasPi

mm0fmf <none@invalid.com> wrote:

On 15/07/2025 21:04, druck wrote:

On 11/07/2025 07:30, mm0fmf wrote:

On 11/07/2025 06:23, David Taylor wrote:

On 11/07/2025 01:37, vjp2.at@at.BioStrategist.dot.dot.com wrote:

If I connect the RasPi to my laptop by USB is there any software
which allows my laptop to be KVM (Keyboard, Video, Mouse)?
>
PuTTY may work, but it doesn't have graphics.

>
I recall PuTTY having some X11 extension, but I use VNC which, I
suspect, is LAN/WiFi only.

>
Setup RNDIS and you have a network connection between the two over USB.

 
The first search hit on RNDIS for Linux was how they are trying to
expunge the horribly insecure Microsoft protocol from the Linux kernel!
 
---druck

Oh noes!!!!!! MS and insecure protocols.
 
Yes, RNDIS is insecure. But do you know what, if you allow someone to
plug any random device into your computer then insecure protocols are
the least of your problems. If it's your device and your computer then
it's no big deal.

If it's your device and your computer you could just use CDC-NCM instead.
I've used that successfully between Pi-like devices (Beaglebone Black) and
FreeBSD servers.

Here's the script, based on the Beaglebone Linux's bb-usb-gadgets package:
https://github.com/CTSRD-CHERI/morello-bbb-ubuntu-image-builder/blob/master/morello/bb-start-acm-ncm-rndis-old-gadget

It does some combination of USB serial (CDC-ACM), mass storage, RNDIS and
NCM depending on which options you pick.

Theo