参考页面：

https://blogs.msdn.microsoft.com/virtual_pc_guy/2014/09/19/changing-ubuntu-screen-resolution-in-a-hyper-v-vm/

 

1. Open Terminal
2. Type: sudo vi /etc/default/grub
3. Find the line starting with GRUB_CMDLINE_LINUX_DEFAULT, and add video=hyperv_fb:[the resolution you want].  The resolution I want is 1280x720.  So my line ends up looking like this:GRUB_CMDLINE_LINUX_DEFAULT="quiet splash video=hyperv_fb:1280x720"
4. Write the changes and quit vi.
5. Run: sudo update-grub
6. Reboot the virtual machine