Charging

[usib]

Ok, here is something I can't explain.
When I charge my 6700 from USB on any of my Windows machines, it charges fine. It does not matter if the machine in question has ActiveSync or not.
However, if I plug into a USB port on any of my Linux machines, it charges for about 30 seconds and then stops, just as if the cable were yanked out. I wonder if anyone knows what is going on, all I want is just get some electricity (so to speak)...