The hub works fine with your desktop pc and not into your car.. have you tried using another hub (branded) just to double check?
i have a problem
i got a cheap USb 2.0 hub (4 ports) unknown company
and when i connect it to my car pc it works (led turn on) but none
of the stuff that connected to the hub wont work until i remove the hub
and plug it again...
i tried to connect the hub to a different port
i tried to use only one device on the hub
i tried to connect stuff to the hub after the car pc finished booting
i need to remove the hub and plug it again for everything to work
on the hub i need to use a very low power consuming devices
so i dont worry about the power (car2pc, small mp3 player, ect.)
i have VIA EPIA EN15000G motherboard
and i don't think the problem is in the hub
i tried it on my home pc and everything is working fine
by the way... i'm not the only one with this problem
i haven't but it seems that i'm not the only one having this problem...
maybe it's something in the BIOS