How to resolve the issue of Ubuntu virtual machine not able to go full screen?

The issue of not being able to go full screen in a virtual machine is usually caused by not installing or configuring the virtual machine tools package correctly. Here are some common methods to solve this problem:

1. Install the virtual machine tool kit: In a virtual machine, there is usually a virtual machine tool kit (such as VMware Tools, VirtualBox Guest Additions, etc.), installing this tool kit can provide better performance and functionality. You can find the option to install this tool kit in the virtual machine host menu.
2. Enable Virtual Machine Tools features: After installing the Virtual Machine Tools, you may also need to enable the related features. You can find options such as automatic screen resizing and full-screen mode in the settings of the Virtual Machine Tools.
3. Update your virtual machine software: Make sure your virtual machine software (such as VMware Workstation, VirtualBox, etc.) is the latest version to ensure optimal performance and compatibility.
4. Adjusting virtual machine resolution: If the virtual machine tools cannot solve the issue, you can try manually adjusting the virtual machine’s resolution to fit full screen display. In Ubuntu, you can find the display option in system settings and adjust the resolution setting.

I hope the above methods can help you resolve the issue of the virtual machine not being able to go full screen. If the problem still persists, please try searching for related solutions or seek official support from the virtual machine software.