I'm trying to run your C++ or QML sample application and they stay gray. I'm also seeing some blinking.
I downloaded the SDK, I install it on my laptop (on Ubuntu 16.04) and then I started the script: ArcGISRuntimeSDKQt_CppSamples.sh and ArcGISRuntimeSDKQt_QMLSamples.sh
Both applications have the same trouble. Did I do something wrong ? Did I forget setup steps ?