Originally Posted by farmdve
It's possible it might not be a bug. According to a guy that works with AMD, different OEMs may change stuff on the PCB resulting in code that might work for a XXX card in general but not for Sapphire,Xfx etc.
I am not as experienced with I2C as W1zzard, but I have had my fair share of it these past few days and know how easily things may not work.
It is not locked, GPU Caps Viewer use it also several OpenCL Benchmarks from Geek3D detects correct and use it in tests.