I started one Genymotion device, but it always be unknown in the Android Studio device list. And when I run app, it failed:
java.io.IOException: Unable to open sync connection!
Error while Installing APK
Genymotion version is 2.12.0 (I have already re-installed it), Android Studio version is 3.0.1 (it works for real device)
It's really weird, please help, thanks