An update for the community at large, both my S9s upgraded without issue. They seem to be hashing better but it could very likley be varince in the pool. Batch 13 miners, firmware Antminer-S9-all-201611252206-autofreq-user.tar.gz which I think is the latest.
This update procedure is nerve-wracking when it is done remotely.
After software boots, somehow there is a socket failed indication.
I had no idea what it means, tried to reverse with a backup, which failed somehow, then I decided to reinstall upgrade again, saw socket failed for a second time and decided to simply wait. At that time miner did not show any mining, obviously. In about 3-5 min, miner started mining. Instead of PCB and chip temp there is now Chip1 (which is absent) and Chip 2 temp. Temp was actually higher than before initially, but eased below 98C (not to 80ies , though). Overall, chip temp are a bit higher, but WU is slightly higher as well.
Not sure that I will do the update on more machines.
12.83's seem to like the new firmware. But I like to leave things alone. If a board goes and you have to repair you are down one board for a week.
