The serial connection from my Artemis Dev kit https://www.sparkfun.com/products/16828 to my Win10 laptop works great with the supplied USB cable. When I add a USB extension cable in between, the serial connection stops working (that is, I don't get any Serial messages).
The Device Manager shows the COM port and says it is working properly
The Artemis drive shows up in both cases, so at least some form of communication is still working.
I have tried two different extension cables and got the same results. Both cables work fine for other boards.
Has anyone else run into this issue?