My Laptop has 3 USB Ports.
No other Miner connected!!!
I have tried other Computers!!! ( Driver shows up, cgminer: no devices detected )
( i'm wiriting this just because you think i'm stupid and do all wrong )
Even on Ports where the U3 never was connected zdiag 2.1.1 shows:
cp2102 USB to ....
Driver WinUSB (v6.1.7600.16385) --> Driver WinUSB (v6.1.7600.16385)
Reinstall Driver
I HAVE REINSTALLED THE DRIVER!!!
cgminer 4.9.1 --benchmark still No devices detected!
Do you get the same in non benchmark mode? Mine does work on 20150103 or 20141222 in benchmark, yet does on both normally. Its possible its because --benchmark doesn't *appear* to use the same "prod it to make sure its a U3" on startup.