I purchased an active mDP to HDMI adapter from Amazon (Plugable is the brand) and so far the external monitor is working correctly through the dock.
Moderator Edit (11/3/2015): If you are using a passive MDP to DVI adapter and experiencing difficulties, you may need to switch to using an active adapter.
If you switched from a passive to active adapter and continue to experience difficulties using Surface Dock to display to external monitors please consider making some changes to your cabling: different lengths, different quality, different adapters, etc. If adjusting your cabling fails to resolve please consider sharing the following:
- Make and model of external displays
- Make/model of adapters if present
- Make/model of cables
For more troubleshooting info and steps to confirm your Dock is updated, please view our Troubleshoot Surface Dock article.
Thank you,
Josh