Fired up zm and each GPU connected to suprnova with no issues.
Started mining but didn't hear the GPU fans making their normal speedup sounds. Kept waiting and I hit 63C on my MSI 1070 before I pulled the plug--card has never went above 53C. I looked at my photo where sudo can't set the hostname and I don't see any fan control commands. In nvOC you can either set manual fan speeds or auto, but I don't see anything as far as fan control in Ubuminer.
I can add that to UbuMiner if people would like that. But then you'd just run with a static fan speed the entire time unless I take time to add a sort of temp watchdog like nvOC has. I can do that but in reality that was one of the reasons I walked away from nvOC. The watchdogs kept doing things to the system that I didn't necessarily care for or want. It's easy to put in if you'd like a static speed for the fans though. And as with the OverClock I can provide the fan control on a PER CARD basis.
I'll add this into v0.73
Regarding your hostname error, that's really odd? So right now in your hostname file you have no extra whitespace at the end of your RigName? -Sounds like something odd is going on there. I have never had an issue with that ever. If you figure out why you're getting the error can you please let me know?