I recently upgraded laptops, it has a dedicated AMD/ATI graphics card as well as an Integrated HD graphics adapter. After getting it all setup I tried to work on a Windows Phone app. Everything went fine but when I started the app on the emulator after the initial “Windows Phone” … “Loading” screen, the screen went blank as shown below
After putting this out to a mailing list I’m on I received good feedback from Rob Miles and Den Delimarsky that the issue might be this sort of dual graphics adapter configuration.
After a little bit of searching, I found a mechanism within the Catalyst Control Center where I could assign different modes to different applications.
So after finding XdeLauncher.exe at C:\Program Files (x86)\Microsoft SDKs\Windows Phone\v7.1\Tools\XDE Launcher I configured it to use the Power Saving graphics processor and life is good again (i.e. my emulator works great! 
) .
-twb
I had a similar emulator problem due to not having a WDDM 1.1 driver (desktop PC). I had to replace my video card.
ReplyDeletehttp://www.telerik.com/community/forums/windows-phone/phoneapplicationframe/phoneapplicationframe-blanks-text-in-mango-beta-emulator.aspx
Gary Davis