I was initially scared out of connecting a USB keyboard to my laptop due to this paragraph in the docs:
If you use a USB keyboard, there is a high risk of locking yourself out of your system when experimenting with USB qubes. For example, if a USB qube takes over your sole USB controller (to which your USB keyboard is connected), then your keyboard will no longer be able to control dom0. This will prevent you from performing many essential tasks, such as entering your decryption and login passphrases, rendering your system unusable until you reinstall
However, after connecting a USB mouse with no issues and my touchpad still works, I am wondering if it’s not as risky as the docs state it is.
Do integrated keyboards on laptops still work after connecting (and using) USB keyboards?
Depends on how your builtin keyboard is connected internally.
If it’s PS/2 then no, it will keep on working pretty much no matter what.
If it’s USB then “yes”, if you manually undo the configuration that allows you to use it in dom0 at the moment and attach relevant usb controller to sys-usb. Otherwise it will continue working the same way it was before.
I confirmed it’s PS/2 and then connected a USB keyboard which works while the integrated keyboard also works. Thankfully I won’t get locked out of my system!