About the timeout, I think we need to rule out a grm issue as I have been running it on a raspberry PI 1 for almost days without issues.
Could you PM you config file, I'll set up my simulator to see if everything checks out.
Also, what's the command you are using to start grm? and are you running it as a service or from the command line?
I'll. take a look at the Nvidia output and provide you a fix.
With 2.1.0 it has stopped crashing on me and has now been running for 13 hours, so that's good
With 2.1.1 the fanspeed issue is resolved on my end. Good work. Your efforts are much appreciated.