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+Qemu VM start kills Pulseaudio
+
+When I start a VM (start command below) in Qemu version >2.5, it kills Pulseaudio (paired with a huge lagspike) in ~4/5 cases. Using version 2.5 build from GIT, it works fine. This also happens when building from the current GIT master (ebedf0f).
+Host:
+  Freshly installed Antergos Arch Linux 4.10.3-1-ARCH
+  Intel I7-5930K
+  ASUS X99 Deluxe II latest UEFI
+  GTX 770
+
+Guest:
+  Windows 10 x64
+  AMD RX480 via VFIO
+
+This also happened on my last install (Ubuntu GNOME 16.10).
+
+Start command:
+  QEMU_AUDIO_DRV=pa \
+  QEMU_PA_SAMPLES=4096 \
+  qemu-system-x86_64 \
+    -serial none \
+    -parallel none \
+    -nodefconfig \
+    -nodefaults \
+    -name win10 \
+    -enable-kvm \
+    -cpu host,check,kvm=off \
+    -smp 12,sockets=1,cores=6,threads=2 \
+    -m 16G \
+    -mem-prealloc \
+    -device nec-usb-xhci,id=xhci \
+    -device usb-host,vendorid=0x05ac,productid=0x0205,bus=xhci.0 \
+    -net nic,vlan=0,model=virtio \
+    -net bridge,vlan=0,br=bridge0 \
+    -object iothread,id=iothread0 \
+    -device virtio-blk-pci,iothread=iothread0,drive=drive0 \
+    -drive file="$DISK",format=raw,if=none,cache=none,aio=native,id=drive0 \
+    -boot order=c,menu=on \
+    -rtc base=utc \
+    -nographic \
+    -k de \
+    -monitor stdio \
+    -soundhw hda \
+    -device vfio-pci,host=02:00.0,addr=09.0,multifunction=on,x-vga=on \
+    -device vfio-pci,host=02:00.1,addr=09.1 \
+    -device vfio-pci,host=04:00.0,addr=07.0,multifunction=on,id=usbcontroller
+
+When it kills Pulseaudio, I see these errors in the Qemu console:
+  pulseaudio: set_sink_input_volume() failed
+  pulseaudio: Reason: Bad state
+  pulseaudio: set_sink_input_mute() failed
+  pulseaudio: Reason: Bad state
+  pulseaudio: set_source_output_volume() failed
+  ... many more of these ...
+
+The journal shows that PulseAudio is killed:
+  Mär 19 13:12:42 hp-desktop systemd[530]: pulseaudio.service: Main process exited, code=killed, status=9/KILL
+  Mär 19 13:12:42 hp-desktop systemd[530]: pulseaudio.service: Unit entered failed state.
+  Mär 19 13:12:42 hp-desktop systemd[530]: pulseaudio.service: Failed with result 'signal'.
+  Mär 19 13:12:42 hp-desktop systemd[530]: pulseaudio.service: Service hold-off time over, scheduling restart.
+  Mär 19 13:12:42 hp-desktop systemd[530]: Stopped Sound Service.
+  Mär 19 13:12:42 hp-desktop systemd[530]: Starting Sound Service...
+
+I've also captured a PulseAudio debug log when this happens, but it does not contain anything interesting (no warnings or errors), which makes sense in case of SIGKILL.
+
+In DMESG I get some errors too, but they seem to be just symptoms (but Im just guessing...); 00:14.0 is the USB controller my DAC is connected to:
+  [ 4372.389051] usb 3-9.4: current rate 4500480 is different from the runtime rate 44100
+  [ 4372.509163] usb 3-9.4: current rate 4500480 is different from the runtime rate 44100
+  [ 4372.559104] usb 3-9.4: current rate 4500480 is different from the runtime rate 44100
+  [ 4373.652557] xhci_hcd 0000:00:14.0: ERROR unknown event type 37
+  [ 4373.712382] xhci_hcd 0000:00:14.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 1 comp_code 36
+  [ 4373.715714] xhci_hcd 0000:00:14.0: Looking for event-dma 0000000745da7f00 trb-start 0000000745da7f10 trb-end 0000000745da7f10 seg-start 0000000745da7000 seg-end 0000000745da7ff0
+  [ 4373.719055] xhci_hcd 0000:00:14.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 1 comp_code 1
+  [ 4373.722381] xhci_hcd 0000:00:14.0: Looking for event-dma 0000000745da7f00 trb-start 0000000745da7f10 trb-end 0000000745da7f10 seg-start 0000000745da7000 seg-end 0000000745da7ff0
+  [ 4373.725753] xhci_hcd 0000:00:14.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 4 comp_code 13
+  [ 4373.725759] xhci_hcd 0000:00:14.0: Looking for event-dma 000000073c5a51a0 trb-start 000000073c5a51b0 trb-end 000000073c5a51b0 seg-start 000000073c5a5000 seg-end 000000073c5a5ff0
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