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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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