[Bug 1908832] Re: jack audio dev produces no sound

[José Pekkarinen]

I unmasked qemu-5.2.0-r1, well, actually any newer qemu coming
from gentoo, and rebuild the software. The situation is still
reproducible, which confirms what I tested yesterday with the
patch. I also cleaned up the launch script to remove several
spice related unneeded since I use the gtk display, here is
how it looks like right now:

/usr/bin/qemu-system-x86_64 -enable-kvm -M q35 -vga virtio -display gtk,gl=on \
        -cpu host -smp 4,cores=4,threads=1 \
        -m 2G -L /usr/share/qemu \
        -global ICH9-LPC.disable_s3=1 -global ICH9-LPC.disable_s4=1 \
        -drive 
file=/usr/share/edk2-ovmf/OVMF_CODE.fd,if=pflash,format=raw,unit=0,readonly=on \
        -drive file=debian_VARS.fd,if=pflash,format=raw,unit=1 \
        -audiodev id=jack,driver=jack -device ich9-intel-hda -device 
hda-duplex,audiodev=jack \
        -device nec-usb-xhci,id=usb \
        -device usb-host,vendorid=0x04ca,productid=0x708e \
        -device usb-host,vendorid=0x1050,productid=0x0407 \
        -netdev user,id=user.0 -device virtio-net-pci,netdev=user.0 \
        -drive file=debian.qcow2,cache=none,aio=io_uring,if=virtio

Thanks!

José.

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1908832

Title:
  jack audio dev produces no sound

Status in QEMU:
  New

Bug description:
  Hi,

  I'm testing the new jack audiodev backend in my
  laptop. The host system is gentoo, using the
  ebuild for qemu 5.1.0-r2, and I'm using jack
  use flag globally in the system so any ebuild
  that have support for jack should be build with
  it. The jack setup reportedly works as I use it
  with firefox, and mumble with no trouble. When
  I launch the following script, I see the vm
  connects to jack:

  /usr/bin/qemu-system-x86_64 -enable-kvm -M q35 -vga virtio -display gtk,gl=on 
\
          -cpu host -smp 2,cores=2,threads=1 \
          -m 4G -L /usr/share/qemu \
          -global ICH9-LPC.disable_s3=1 -global ICH9-LPC.disable_s4=1 \
          -drive 
file=/usr/share/edk2-ovmf/OVMF_CODE.fd,if=pflash,format=raw,unit=0,readonly=on \
          -drive file=debian_VARS.fd,if=pflash,format=raw,unit=1 \
          -audiodev id=jack,driver=jack -device ich9-intel-hda -device 
hda-duplex,audiodev=jack \
          -device virtio-serial-pci \
          -device virtserialport,chardev=spicechannel0,name=com.redhat.spice.0 \
          -chardev spicevmc,id=spicechannel0,name=vdagent \
          -device nec-usb-xhci,id=usb \
          -device usb-host,vendorid=0x04ca,productid=0x708e \
          -device usb-host,vendorid=0x1050,productid=0x0407 \
          -chardev spicevmc,name=usbredir,id=usbredirchardev1 \
          -device usb-redir,chardev=usbredirchardev1,id=usbredirdev1 \
          -chardev spicevmc,name=usbredir,id=usbredirchardev2 \
          -device usb-redir,chardev=usbredirchardev2,id=usbredirdev2 \
          -chardev spicevmc,name=usbredir,id=usbredirchardev3 \
          -device usb-redir,chardev=usbredirchardev3,id=usbredirdev3 \
          -netdev user,id=user.0 -device virtio-net-pci,netdev=user.0 \
          -drive file=debian.qcow2,cache=none,aio=io_uring,if=virtio

  Output of vm initialization:

  jack: JACK output configured for 48000Hz (1024 samples)
  jack: JACK input configured for 48000Hz (1024 samples)
  gl_version 46 - core profile enabled
  GLSL feature level 430

  Though executing any application that uses sound,
  for instance, any youtube video through browser,
  I listen nothing. By executing pkill jackd, and
  launching the same script replacing the audiodev
  line for the following:

          -audiodev id=alsa,driver=alsa -device ich9-intel-hda -device
  hda-duplex,audiodev=alsa \

  The audio works, and I can listen to music, or
  any other kind of application, though I cannot
  listen anything else in the host.

  The guest is a simple debian testing(bullseye)
  system with plasma desktop, using pulseaudio,
  nothing fancy.

  Thanks!

  José

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1908832/+subscriptions