How to change the QEMU display resolution using OVMF

When you followed my tutorial on how to install GhostBSD on QEMU you probably noticed that the resolution of the emulator window is very low when you have a modern monitor with a high resolution. In my case the default resolution in QEMU is 1280x800, it's probably the same for you.

This is how you can increase the resolution in QEMU using the OVMF:

Directly after you started the VM hammer the escape (ESC) key on your keyboard to get into the OVMF BIOS menu.

Then go to "Device Manager->OVMF Platform Configuration" and change the value "Change Preferred Resolution for Next Boot" to a higher resolution, e.g. 1920x1080.

Then select "Commit Changes and Exit", press the ESC key to get to the main menu and select "Reset" to reboot.

After the GhostBSD MATE desktop environment loaded you most likely will be faced face this warning message in your top right corner:

This can be fixed by opening the Caja file manager, editing the path with the pencil icon (the target folder is hidden) and typing ~/.config/ followed by the Enter key there.

Then open the file monitors.xml with the Pluma text editor and update the resolution between the <width> and <height> fields and save it.

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