<div dir="ltr">So you're passing the entire usb controller through? Why not just pass the USB device itself through? Something like:<div> </div><div><div style="font-size:12.8px"> <hostdev mode='subsystem' type='usb' managed='yes'></div><div style="font-size:12.8px"> <source></div><div style="font-size:12.8px"> <vendor id='0x045e'/></div><div style="font-size:12.8px"> <product id='0x070f'/></div><div style="font-size:12.8px"> </source></div><div style="font-size:12.8px"> </hostdev></div></div><div style="font-size:12.8px"> </div><div style="font-size:12.8px">That may not fix your issue but it's probably simpler. </div><div style="font-size:12.8px"> </div><div style="font-size:12.8px">Also did you change the sample rate to DVD quality (to match your host)?</div></div><div class="gmail_extra"> <div class="gmail_quote">On Fri, Feb 3, 2017 at 2:53 PM, Tmplt <<a href="mailto:tmplt@dragons.rocks" target="_blank">tmplt@dragons.rocks</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I saw on an older thread here that passing a USB controller through and using a USB soundcard through it solved that users audio issues. I tried that myself by adding <hostdev mode='subsystem' type='pci' managed='no'> <source> <address domain='0x0000' bus='0x00' slot='0x14' function='0x0'/> </source> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </hostdev> to the .xml-file, but I can still hear frequent audio stutters akin to my quoted thread. Am I passing the controller incorrectly? The device I'm trying to play through is a FiiO e10k DAC which works without issue on the host and on bare-metal Windows 8.1. Here follows my windows-pciusb.xml: <domain type='kvm'> <name>windows-pciusb</name> <uuid>7353cd48-34ee-4a26-b8ac-7c5d1735777a</uuid> <memory unit='KiB'>8388608</memory> <currentMemory unit='KiB'>8388608</currentMemory> <vcpu placement='static'>4</vcpu> <iothreads>2</iothreads> <cputune> <vcpupin vcpu='0' cpuset='0'/> <vcpupin vcpu='1' cpuset='1'/> <vcpupin vcpu='2' cpuset='2'/> <vcpupin vcpu='3' cpuset='3'/> </cputune> <os> <type arch='x86_64' machine='pc-i440fx-2.7'>hvm</type> <loader readonly='yes' type='pflash'>/usr/share/ovmf/x64/ovmf_x64.bin</loader> <nvram>/var/lib/libvirt/qemu/nvram/windows_VARS.fd</nvram> <bootmenu enable='no'/> </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'> <topology sockets='1' cores='4' threads='1'/> </cpu> <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/sbin/qemu-system-x86_64</emulator> <disk type='block' device='disk'> <driver name='qemu' type='raw' cache='none' io='threads' iothread='1'/> <source dev='/dev/sda'/> <target dev='vdb' bus='virtio'/> <boot order='3'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/> </disk> <disk type='block' device='disk'> <driver name='qemu' type='raw' cache='none' io='threads' iothread='2'/> <source dev='/dev/sde2'/> <target dev='vdc' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x0c' function='0x0'/> </disk> <controller type='usb' index='0' model='ich9-ehci1'> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x7'/> </controller> <controller type='usb' index='0' model='ich9-uhci1'> <master startport='0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0' multifunction='on'/> </controller> <controller type='usb' index='0' model='ich9-uhci2'> <master startport='2'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x1'/> </controller> <controller type='usb' index='0' model='ich9-uhci3'> <master startport='4'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x2'/> </controller> <controller type='pci' index='0' model='pci-root'/> <controller type='ide' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <controller type='virtio-serial' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </controller> <interface type='network'> <mac address='52:54:00:0d:18:bf'/> <source network='default'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <input type='mouse' bus='ps2'/> <input type='keyboard' bus='ps2'/> <sound model='ich6'> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </sound> <hostdev mode='subsystem' type='pci' managed='yes'> <source> <address domain='0x0000' bus='0x02' slot='0x00' function='0x0'/> </source> <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/> </hostdev> <hostdev mode='subsystem' type='pci' managed='yes'> <source> <address domain='0x0000' bus='0x02' slot='0x00' function='0x1'/> </source> <address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/> </hostdev> <hostdev mode='subsystem' type='pci' managed='yes'> <source> <address domain='0x0000' bus='0x07' slot='0x00' function='0x0'/> </source> <address type='pci' domain='0x0000' bus='0x00' slot='0x0b' function='0x0'/> </hostdev> <hostdev mode='subsystem' type='usb' managed='yes'> <source> <vendor id='0x045e'/> <product id='0x028e'/> </source> <address type='usb' bus='0' port='1'/> </hostdev> <hostdev mode='subsystem' type='pci' managed='no'> <source> <address domain='0x0000' bus='0x00' slot='0x14' 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='0x07' function='0x0'/> </memballoon> </devices> </domain> lsusb reports that everything goes to the same, single USB controller, which is what I pass. Could that be the issue? I'm qouting my last thread in case any info there helps. Thanks in advance! On 01/29/2017 12:38 AM, Tmplt wrote: > I forgot to mention: I'm using the linux-vfio kernel, v4.8.13, and my > only kernel options are intel_iommu=on and pcie_acs_override=downstream. > > On 01/28/2017 06:13 AM, Tmplt wrote: >> Having spent some hours (unsucessfully) to get stutter-free audio via >> Pulseaudio (and ALSA) have left me with the options of either dual >> booting or letting dedicated hardware handle the audio, which I can then >> mix together into a single output. >> >> However, passing only the GPU as a soundcard and listening to the audio >> via my monitor's headphone jack, there is some noticable audio >> stuttering. While only noticable when running some more heavier games >> (e.g. Battlefield 1), I'm guessing this shouldn't be the case, and that >> I've configured something incorrectly. Especially since I've enabled >> MSIs for both the GPU and the GPUs audio device. >> >> Here is what my system is: >> CPU: i5-6600k @ stock >> MOBO: ASUS Z170-A >> RAM: 16GB DDR4 at 2133Mhz (I think, could be 1600) >> GPU: ASUS R9 290 (for the VM; reference card) >> >> HOST OS: Arch Linux >> GUEST OS: Windows 8.1 >> >> I run my VM via qemu (2.8.0) and libvirt (2.4.0). >> >> When Windows was installed it automatically enabled MSI for the GPU. I >> manually enabled it for the audio device, rebooted, and confirmed that >> they both appeared below the IRQ drop-down in the device manager. >> >> It can be worth of note that I flashed my card with a UEFI-bios some >> time ago so that it got passed-through without issue. I can't recall >> whether this was required for my qemu config at the time or if a >> non-UEFI card can't be passed through. I'm also not sure if both BIOSes >> (there is a switch to toggle between the two on my card) are overwritten >> during the flash, or just the current one. Either case, the topical >> issue is present on both settings. _______________________________________________ vfio-users mailing list <a href="mailto:vfio-users@redhat.com">vfio-users@redhat.com</a> <a href="https://www.redhat.com/mailman/listinfo/vfio-users" rel="noreferrer" target="_blank">https://www.redhat.com/mailman/listinfo/vfio-users</a> </blockquote></div> </div>