I have a Mac Pro and a MacBook5,1.
Mac Pro is attached to a BenQ monitor which supports DDC/CI communication.
With a capable software I'm able to set brightness and contrast of the monitor without using monitor's OSD (thanks to DDC/CI communication).
I can calibrate the monitor as well.
If I attach the same monitor to my MacBook5,1 with VGA cable through a Mini DisplayPort to VGA adapter, DDC/CI stops working.
I'm no more able to set brightness and contrast and the app reports that monitor isn't DDC/CI capable.
I'm sure its not an issue related to the app that I'm using to set brightness and contrast. It detects correctly both of the monitor (the internal and the external one) and I'm sure that I'm sending DDC/CI commands to the external monitor and not to the internal one.
So, does Mini DisplayPort to VGA adapter support DDC/CI, and therefore passthrough its signal?
I hope you can help me.
Regards
Andrea
Mac Pro is attached to a BenQ monitor which supports DDC/CI communication.
With a capable software I'm able to set brightness and contrast of the monitor without using monitor's OSD (thanks to DDC/CI communication).
I can calibrate the monitor as well.
If I attach the same monitor to my MacBook5,1 with VGA cable through a Mini DisplayPort to VGA adapter, DDC/CI stops working.
I'm no more able to set brightness and contrast and the app reports that monitor isn't DDC/CI capable.
I'm sure its not an issue related to the app that I'm using to set brightness and contrast. It detects correctly both of the monitor (the internal and the external one) and I'm sure that I'm sending DDC/CI commands to the external monitor and not to the internal one.
So, does Mini DisplayPort to VGA adapter support DDC/CI, and therefore passthrough its signal?
I hope you can help me.
Regards
Andrea