This is my first time using QGC.
I follow the tutorial https://docs.qgroundcontrol.com/en/getting_started/download_and_install.html#ubuntu-linux
Installation, I have used both methods, and they all installed successfully, but when I start QGC, it will turn black.
My OS is ubuntu16.04LTS.
The QGC I installed is v3.4.4.
Also I use Oracle VM VirtualBox v5.2.12.