Istvan Gabor wrote:

> The question is how the system decides which group a device belongs to.
> If there is some device or property database we could modify it
> according to
> our needs.

not 100% sure but I think it is udev/kernel. Look in to udev. The library
(rules) is in /lib/udev/
And you can put your own rules in /etc/udev/rules.d/ that can fix the
problem for class of devices based on criteria or specific device based on
vendor and/or device id.

regards