Tell me more ×
Ask Different is a question and answer site for power users of Apple hardware and software. It's 100% free, no registration required.
up vote 3 down vote favorite

I developed a Cocoa based OS X app to set brightness and contrast of a monitor using DDC/CI communication.

The app works perfectly using a Mac Pro attached to a BenQ DDC/CI capable monitor. It works with every connection interface: VGA, DVI and HDMI.

If I attach the same BenQ monitor to a MacBook via Apple Mini DisplayPort to VGA adapter, the app isn't able to send DDC/CI commands to the monitor...it reports that the monitor isn't DDC/CI capable.

I'm sure it is not an issue related to the app. 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.

Does Apple Mini DisplayPort to VGA adapter support DDC/CI?

share|improve this question
1  
How this question is supposed to be off-topic? It's exactly about Apple hardware.. – Andrea3000 Nov 23 '11 at 22:42
Calling this off topic is silly. @Andrea3000, are you able to share this app? I am searching for a software tool that can set monitor brightness and contrast. Is it for sale? – hekevintran May 22 '12 at 16:32

closed as off topic by Daniel Lawson♦, Dori Nov 9 '11 at 7:57

Questions on Ask Different are expected to relate to Apple hardware or software within the scope defined in the FAQ. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about closed questions here.