I stumbled across this bug: https://bugs.launchpad.net/ubuntu/+source/linux-rt/+bug/367671 Im not sure if that bug relates to this one, but after disabling realtime scheduling, pulseaudio does not crash anymore. However, the lag when starting the VM got significantly worse, the system is pretty much unusable the first ~20-30 seconds.
-- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1674117 Title: Qemu VM start kills Pulseaudio Status in QEMU: New Bug description: 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 To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1674117/+subscriptions
