[CentOS-virt] Assigning a PCI sound device to a VM

Thu Sep 3 19:11:02 UTC 2015
Robert Nichols <rnicholsNOSPAM at comcast.net>

On 09/03/2015 01:59 PM, Robert Nichols wrote:
> On 09/03/2015 03:14 AM, George Dunlap wrote:
>> On Thu, Sep 3, 2015 at 2:29 AM, Robert Nichols
>> <rnicholsNOSPAM at comcast.net> wrote:
>>> I have a PCI sound card that I would like to assign to a VM, but
>>> when I try to do so the VM fails to start and displays this message:
>>> Error starting domain: Unable to read from monitor: Connection reset
>>> by peer
> [SNIP]
>>> The sound card is an Asus Xonar DGX PCIe 5.1, and identifies itself
>>> as "07:04.0 Multimedia audio controller: C-Media Electronics Inc CMI8788
>>> [Oxygen HD Audio]".
>>> I see the same problem if I try to assign the motherboard's Intel
>>> Xeon E3-1200 HD Audio Controller to the VM.  Both of these devices
>>> are supported by the host kernel (3.18.17-13.el6.x86_64).
>>> I have no problem assigning a USB sound device, but those have very
>>> limited capability.
>> Which hypervisor / CentOS version are you using?
> libvirt-0.10.2-54.el6.x86_64 in CentOS 6.7,
> using kernel-3.18.17-13.el6.x86_64 from the Xen4CentOS 6 repo.
> (I need that kernel for the motherboard's sound controller.  The
>   behavior when trying to assign a PCI device to the VM is the
>   same with the standard 2.6.32 kernel in CentOS 6.7.)

That's qemu / KVM.

Bob Nichols     "NOSPAM" is really part of my email address.
                 Do NOT delete it.