Well, I recently had yet another UCS display/I2C communication problem. Somehow one of my chassis’ started to think, that the power redundancy was lost.
After looking at it a bit deeper, it seems only the GUI or the chassis did notice this power glitch:
As you can see, all PSU’s still have power. Now, since I had a big maintainance window the last weekend anyhow (and I spent ~14 hours at work), I decided to restart the IO modules in that chassis. And guess what: The error is gone! Another weird I2C communication issue with the firmware release 2.0.2 …