KC4BQK-10 Gateway station 1200 baud and 9600 baud are now running on a Raspberry PI 2. It seems to be working fine. I will be testing and tuning for a couple of weeks. If it works like I expect, I will make it permanent.
UPDATE: Other folks reported trying different things to resolve this issue, but what worked for me was to reload the USB driver for the IC-7200 radio.
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Due to a recent Win 10 Features update, Trimode currently cannot initiate the Winmor TNC correctly, so the Colorado Springs HF gateway will only be able to run ARDOP until I get things sorted out.