[vfio-users] No HDMI audio from AMD RX480 when passed through to Windows 8.1 VM.

[Janusz]

So Windows doesn't recognize audio device at all? you installed relive
drivers? you are sure there is no other "virtual" audio device selected
as default?

On 01/18/2017 10:21 AM, Luke Yelavich wrote:
> Greetings.
> I'm writing with a rather annoying problem. I am unable to get audio output through HDMI on an AMD RX480 card that is being passed through to a Windows 8.1 VM.
>
> I am running Fedora 25 with all updates applied as of today, 18 January 2017. I am using libvirt with qemu/KVM, and I am using virt-manager to set things up. The graphics card itself works fine once the AMD drivers are installed.
>
> I was reading through the list archives, and noticed that someone else had a similar suggestion. One suggestion I remember trying in that thread was to configure the HDMI audio device as a sub-device of the main graphics card, but that doesn't seem to have helped. You will notice that change in the XML pasted below.
>
> One other thing that was asked in that thread was to provide the output of the domxml-to-native command from virsh. In attempting to run that command, I get
> error: internal error: invalid PCI passthrough type 'default'
>
> Any help is much appreciated, XML is below.
>
> Thanks in advance.
>
> Luke
>
> <domain type='kvm'>
>   <name>Win8.1-Pro-64</name>
>   <uuid>fc91d936-dbfb-4ddc-a535-752680b969e0</uuid>
>   <title>Windows 8.1 Professional 64-bit</title>
>   <memory unit='KiB'>16777216</memory>
>   <currentMemory unit='KiB'>16777216</currentMemory>
>   <vcpu placement='static'>2</vcpu>
>   <os>
>     <type arch='x86_64' machine='pc-i440fx-2.7'>hvm</type>
>     <loader readonly='yes' type='pflash'>/usr/share/edk2/ovmf/OVMF_CODE.fd</loader>
>     <nvram>/var/lib/libvirt/qemu/nvram/Win8.1-Pro-64_VARS.fd</nvram>
>   </os>
>   <features>
>     <acpi/>
>     <apic/>
>     <hyperv>
>       <relaxed state='on'/>
>       <vapic state='on'/>
>       <spinlocks state='on' retries='8191'/>
>     </hyperv>
>     <vmport state='off'/>
>   </features>
>   <cpu mode='host-passthrough'/>
>   <clock offset='localtime'>
>     <timer name='rtc' tickpolicy='catchup'/>
>     <timer name='pit' tickpolicy='delay'/>
>     <timer name='hpet' present='no'/>
>     <timer name='hypervclock' present='yes'/>
>   </clock>
>   <on_poweroff>destroy</on_poweroff>
>   <on_reboot>restart</on_reboot>
>   <on_crash>restart</on_crash>
>   <pm>
>     <suspend-to-mem enabled='no'/>
>     <suspend-to-disk enabled='no'/>
>   </pm>
>   <devices>
>     <emulator>/usr/bin/qemu-kvm</emulator>
>     <disk type='block' device='disk'>
>       <driver name='qemu' type='raw' cache='none' io='native'/>
>       <source dev='/dev/fedora_balta/Win8.1-Pro-64'/>
>       <target dev='sda' bus='scsi'/>
>       <boot order='2'/>
>       <address type='drive' controller='0' bus='0' target='0' unit='0'/>
>     </disk>
>     <controller type='usb' index='0' model='ich9-ehci1'>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x7'/>
>     </controller>
>     <controller type='usb' index='0' model='ich9-uhci1'>
>       <master startport='0'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0' multifunction='on'/>
>     </controller>
>     <controller type='usb' index='0' model='ich9-uhci2'>
>       <master startport='2'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x1'/>
>     </controller>
>     <controller type='usb' index='0' model='ich9-uhci3'>
>       <master startport='4'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x2'/>
>     </controller>
>     <controller type='scsi' index='0' model='virtio-scsi'>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
>     </controller>
>     <controller type='pci' index='0' model='pci-root'/>
>     <interface type='bridge'>
>       <mac address='52:54:00:02:48:5f'/>
>       <source bridge='bridge0'/>
>       <model type='rtl8139'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
>     </interface>
>     <input type='mouse' bus='ps2'/>
>     <input type='keyboard' bus='ps2'/>
>     <hostdev mode='subsystem' type='pci' managed='yes'>
>       <source>
>         <address domain='0x0000' bus='0x03' slot='0x00' function='0x0'/>
>       </source>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0' multifunction='on'/>
>     </hostdev>
>     <hostdev mode='subsystem' type='pci' managed='yes'>
>       <source>
>         <address domain='0x0000' bus='0x03' slot='0x00' function='0x1'/>
>       </source>
>       <rom bar='off'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x1'/>
>     </hostdev>
>     <hostdev mode='subsystem' type='pci' managed='yes'>
>       <source>
>         <address domain='0x0000' bus='0x00' slot='0x1d' function='0x0'/>
>       </source>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
>     </hostdev>
>     <memballoon model='virtio'>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
>     </memballoon>
>   </devices>
> </domain>
>
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