I really love using Hyper-V both for windows and also linux operating systems. For me, creating a new virtual machine is just like buying a new PC :) In this post, I am going to show you how to easily change screen resolution on an Ubuntu vm that resides inside Hyper-V virtualization environment.

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Just follow those simple steps to change the screen resolution:

1. Open a terminal window
2. Type: sudo vi /etc/default/grub
3. Find the line starting with GRUB_CMDLINE_LINUX_DEFAULT,
4. Append video=hyperv_fb:1280x720 so the line should be like;

   GRUB_CMDLINE_LINUX_DEFAULT="quiet splash video=hyperv_fb:1280x720"

5. Write changes to the file and exit using ESC + :wq
6. Run sudo update-grub command to update grub configuration.
7. Reboot the machine (You can use sudo /sbin/shutdown -r now command)
8. Voila! Your VM now should start with the new resolution you provided.