How to increase display resolution in QEMU/KVM via virt-manager on Manjaro (host/guest)?

Question

How to increase the guest's resolution in QEMU/KVM?

Currently, I am only able to reach a max resolution of 1280x720 on my guest virtual machine; however, I would like to increase it to 1980x1080 to match my host's resolution.

I have Manjaro 18.0.4 running on both my host and on my guest. Here are the steps I followed to setup the system:

On the host OS

sudo pacman -Syu
sudo pacman -S virt-manager qemu vde2 ebtables dnsmasq bridge-utils openbsd-netcat
sudo systemctl enable libvirtd.service
sudo systemctl start libvirtd.service

Then I created a new virtual machine using virt-manager as follows:

• Display server: Spice server + default options
• Video: QXL + vgamem="32768"
• View > Scale Display: Never + Autoresize VM with windows (this option probably are irrelevant to the problem)

On the guest OS

sudo pacman -S spice-vdagent xf86-video-qxl

However the max resolution available is still 1280x720. I would like make changes within virt-manager if possible.

P.S.1: The Scale Display options work but that is not what I want to achieve as the scaled graphics aren't great.

P.S.2: I would like to keep with Spice/QXL setup as it seems better than VGA

Thanks

Solution

This is an issue related to Manjaro running as the guest OS.

The solution is to remove the default xorg configuration in 90-mhwd.conf on the guest OS as posted in this forum:

sudo rm /etc/X11/xorg.conf.d/90-mhwd.conf