osrf/rocker is a lovely docker project which make building ROS environment rapidly. It supports Ubuntu 20 and the latest Nvidia driver. ROS GUI applications and tools work properly with hardware acceleration.
However, when I tried to run Gazebo 7 under Ubuntu 20, there is no title bar on the top and I cannot resize this window.
![](https://chengke.name/wp-content/uploads/2021/03/60fff5d959fb871e41ec4015a126ef74.gif)
The solution is tricky, just press the F11 key twice!