Mac – How to use Qemu/Spice dynamic resolution in a Windows 7 guest

Turns out Spice certainly DOES allow sound passthrough. My issue was that I had put -soundhw hda without putting a \ after it. So now it finally works with the audio passthrough with Spice and here is my run shell script:

#!/bin/bash

#-monitor stdio \

SPICE_PORT=5924

qemu-system-x86_64 \
    -daemonize \
    -enable-kvm \
        -cpu host \
        -drive file=/home/mike/underling.img,if=virtio \
        -net nic,model=virtio -net user,hostname=underling \
        -m 4G \
    -soundhw hda \
        -name Underling \
    -usbdevice tablet \
    -device virtio-serial \
    -chardev spicevmc,id=vdagent,name=vdagent \
    -device virtserialport,chardev=vdagent,name=com.redhat.spice.0 \
    -vga qxl \
    -spice port=${SPICE_PORT},disable-ticketing \
        "$@"
exec spicec --title Underling -h 127.0.0.1 -p ${SPICE_PORT}

I found this. I will be testing it tonight as have the same issue: How to install KVM with a working audio (on Ubuntu)

The things we are trying to fix are:

1. Make KVM run as a non-root user, specifically, as your login, so that it can share your ALSA audio.

2. Make KVM to not disable audio.

3. Replace the KVM binary with a script that sets up proper environment variable, so that KVM and use your alsa audio driver.

Instructions follow:

cd /usr/bin  
sudo mv kvm kvm.bin  
sudo touch kvm  
sudo chmod +x kvm  

Edit /usr/bin/kvm and paste this text in it:

#!/bin/sh  
QEMU_AUDIO_DRV=alsa /usr/bin/kvm.bin $@

Edit /etc/libvirt/qemu.conf and look for the following lines (remember all these lines are in different sections of this file):

vnc_allow_host_audio = 0
#user = "root"
#group = "root"

and replace root with your local user name, for example: vnc_allow_host_audio = 1

user = "gurjeet"
group = "gurjeet"

) Now restart the KVM service:

sudo service libvirt-bin restart

Now launch your guest OS and enjoy its sound.