I added a Garmin G600 TXi 1060 last year to my Commander- it's really a beautiful screen.
I continue to have this problem where the outer knob stops working. I've had it in the shop three times and they can't replicate the problem, but they say the knob tests functional. It almost seems like a software problem. When I turn the outer knob, the setting I am on, course for example, will toggle between the current number and the next number up. So if I'm flying in heading mode at 300° and I turn the knob to the right, it will go to 301° then back to 300° as I continue to turn to the right.
The problem happens about a third of my flights, and cycling the power off in the air and turning it back on does not fix the problem, however occasionally on long flights it will start working in the middle of the flight.
Yesterday I captured a video of the problem:
https://photos.app.goo.gl/LzSbQ4CQMXxqd7QD6
In this video, I was trying to change the IAS, but the problem occurs with any function that uses the outer knob. The IAS setting was at 150 and I was trying to decrease the speed, to climb faster before I took off. In the video I initially turned the knob to the left many clicks, then to the right many clicks. Each time the knob clicked, the IAS speed toggled between 149 and 150 knots.
The shop has done all of the software updates and initially told me that it was probably a fluke software bug that likely won't happen again. Later they said they took the knob apart and everything physically appears okay.
I was hoping someone here may have advise for me.. It is stressful when I'm in my rhythm flying and the knob doesn't work and I have to come up with an alternative way to get the setting in the box.
Many thanks,
Chris