Re: [Qemu-devel] Linux KVM, Windows 7 guest choppy sound

[Avi Kivity <avi@redhat.com>]

On 09/08/2012 01:53 PM, Jan Kiszka wrote:
> On 2012-09-07 18:09, Erik Lotspeich wrote:
>> Hi,
>> 
>> I apologize if this isn't the right venue for this message, but this
>> mailing list seems a bit more active than qemu-discuss.
>> 
>> Background:
>> I am running OpenSUSE 12.1. I fixed audio issues in VM guests by setting
>> the following in qemu.conf:
>> 
>> vnc_allow_host_audio = 1
>> 
>> I also set user= and group= to allow qemu-kvm to run as the same user as
>> I am logged in as. This allowed qemu-kvm to send audio to pulseaudio.
>> 
>> My issue:
>> I am using the ICH6 virtual audio driver in my VMs. In my Linux VMs, the
>> sound works perfectly without any issues. In my Windows 7 VM, the sound
>> works with the exception of static and choppiness in the audio. Has
>> anyone else seen this or have any ideas for a fix?
> 
> Known issue, likely unfixable in QEMU due to hard-coded constraints of
> the driver Windows uses (too small playback buffers).

Would using real-time priority for the guest improve things?

Of course that can be dangerous if the guest decides to spin and has as
many vcpus as you have cores.


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