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This FAQ from Apple: http://support.apple.com/kb/HT3382#5 Key part: 6 Can other video adapters be connected or "daisy-chained" to Apple Mini DisplayPort adapters? No, you should not connect Apple Mini DisplayPort adapters to any other video adapters. Connect your computer directly to an external display via one Mini DisplayPort adapter. So, ...


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Open System Information, then under Hardware select Mini DisplayPort. This will tell you about the firmware of the port controller and more.


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The 2011 MBP (MacBookPro8,1) has thunderbolt, so either your machine is not a 2011, or it has thunderbolt. the 2010 MacBook Pros have MDP that supports audio as well as video (I have a 2009 which only does video). Keep in mind that MDP and Thunderbolt look identical.


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You can connect the Thunderbolt port to a VGA adapter for your VGA monitor. I'm pretty sure it does not matter. I'm not sure if a simple HDMI-to-VGA adapter even exists. The Macbook Retina that I have has 2 thunderbolt ports and one normal-size HDMI port. This MacRumors topic contains some useful info as well: ...


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This problem could also be caused by a missing or improper HDCP signal coming from the MiniDisplayport-to-HDMI adapter. I experienced the same issue with my MacbookPro (late 2008) and a Bravia TV. I tried one cable with a MiniDisplayport connector on one end and HDMI plug at the other. This worked fine between my MBP and a computer monitor or a beamer, but ...


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Troubleshooting steps Try different cable Check Console log to find out the reason Disable Graphics switching Open ColorSync utility (in Utility folder) to see if the display is there and what driver is selected. UPDATE: From your Console log Found 111 modes for display 0x003f003d [111, 0] System is having problem to select which mode to use. Open ...



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