Investigating DDC/CI communication with ASUS PB287 monitor from Fedora 23 Linux on MSI Cubi with Intel HD Graphics 5500
i2cdetect -l
i2c-0 unknown i915 gmbus vga N/A
i2c-1 unknown i915 gmbus dpc N/A
i2c-2 unknown i915 gmbus dpb N/A