Desktop doesn't work with older Radeon GPU

My test system that I use for working with things like this is an older system, with an older integrated GPU. Without the GPU driver loaded, `hello` is limited to a desktop resolution of 720x400, which is basically unusable.

When I run FreeBSD on this system, I use the `radeonkms.ko` driver with Xorg. However, on `hello`, if I get a root shell and `kldload radeonkms` it seems to lock up the system - like, not just locking up the display, but the whole system seems to hang hard. Or at the very least, I can't use ctrl-alt-Fn to switch between virtual consoles to try to recover the system.

Possibly tangentially related, I noted that the "Configure Xorg" app seems to want to you pick that your system has either an Intel or an nVidia GPU, there doesn't seem to be a "none of the above".... Is having one of these two types of GPU going to be a system requirement?