I am using a Hengedock with my 13" Macbook pro mid 2012. Sometimes when I "dock" my MBP in the henge dock, my wallpaper goes back to the default galaxy screen - only on the first desktop! When I go to settings the wallpaper I had previously selected is shown as selected. I have to select a different wallpaper and then re-select the one I want. Then it goes back. Also, it takes a long time to "wake up" my Asus HD screen. Thoughts? I am using MDP to DVI for video.