Hey ya’ll, it doesn’t seem like you can change the console resolution of a Linux guest running on HyperV, but you totally can.
Here’s how:
Edit /etc/default/grub with your favorite editor of choice.
Here it be:
sudo nano /etc/default/grub
Change this line:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
To this:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash video=hyperv_fb:1600x1200"
Then in a console type:
sudo update-grub
I believe the max might be 1920×1200 but I didn’t try it, so I don’t know for sure.