Hi, I noticed the same behaviour at my I7 / win 7 combination. I did find out that frontside ports (50 cm wire to the motherboard) did not work and USB on the backside (mounted at the motherboard) did work.
I made an USB cable with voltmeter connector and I noticed with HackRF connected the front ports drop to about 4.4 Volt but the backside ports are 4,8 Volt. I did not measure the current the HackRF draws but for the raspberry Pi I did some research to find out that the SMD self resetting fuses for the USB power do drop about 0,5 Volt at 0,4 Ampere current. If all fails, try a powered USB hub at first I would say. Kind regards, Ben
_______________________________________________ HackRF-dev mailing list [email protected] http://nine.pairlist.net/mailman/listinfo/hackrf-dev
