Comments (1)
From this post i suspect the monitor you have is a EVDI device, which is a GPU & display combo, not just a plain DisplayLink monitor on a DP/Thunderbolt port.
There appears to be some concept of an EDID block in the EVDI spec to inform the OS of overall dimensions and clocking of your screen, but I don't see an analogue to the I2C control channel that DDC commands are carried on. The asus "EzLink" driver & app (Windows only!) seems to do some thing special to set "auto-bright" on and off, and its not DDC.
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