Hello,
Unfortunately the Full Screen mode, means exactly that, fill the screen with the whole desktop. You can try to change the resolution natively from Ubuntu OS.
Below worked for me. Tested on Ubuntu 20.04 | Host Windows 11.
1.Open grub file.
sudo nano /etc/default/grub
- then
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash video=hyperv_fb:3840x2160"
*Note: Change value of GRUB_CMDLINE_LINUX_DEFAULT with below. Replace 3840x2160 with your highest resolution.
- Run below commands
sudo update-grub
sudo apt install linux-image-extra-virtual
- Shutdown the VM and open PowerShell as administrator on host machine and run below. Replace "ubuntu" with your vm name. Change "3840" and "2160" with your highest resolution.
set-vmvideo -vmname ubuntu -horizontalresolution:3840 -verticalresolution:2160 -resolutiontype single
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