I've narrowed down the slow behavior that I've been observing with Frambuesa. When I do "sudo apt-get install apm-copter-erlebrain", my Erle Brain 3 orange light blinks about 2 times per second as expected, and is very responsive in Mission Planner. However, when I do "sudo apt-get install apm-tri-erlebrain" (after purge of the other package, or just installing it first), the orange light blinks only once about every 8 seconds, and there is a multiple second delay in Mission Planner Flight Planner display. This is 100% reproducible on a fresh image of Frambuesa. Can you confirm your build process for apm-tri-erlebrain ?