qemu run ubuntu + use venus kvm libguestfs video accelaration

fetch_ubuntu.sh

#!/bin/bash

ISO=ubuntu-24.10-desktop-amd64.iso
IMG=ubuntu-24-10.qcow2

if [ ! -f "$ISO" ]; then
    wget https://releases.ubuntu.com/oracular/$ISO
fi

if [ ! -f "$IMG" ]; then
    qemu-img create -f qcow2 $IMG 16G
fi

qemu-system-x86_64 \
    -enable-kvm \
    -M q35 \
    -smp 4 \
    -m 4G \
    -cpu host \
    -net nic,model=virtio \
    -net user,hostfwd=tcp::2222-:22 \
    -device virtio-vga-gl,hostmem=4G,blob=true,venus=true \
    -vga none \
    -display gtk,gl=on,show-cursor=on \
    -usb -device usb-tablet \
    -object memory-backend-memfd,id=mem1,size=4G \
    -machine memory-backend=mem1 \
    -hda $IMG \
    -cdrom $ISO