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

From: Thomas Huth <1908832@bugs.launchpad.net>
To: qemu-devel@nongnu.org
Subject: [Bug 1908832] Re: jack audio dev produces no sound
Date: Thu, 13 May 2021 10:51:59 -0000	[thread overview]
Message-ID: <162090311973.16886.1775254865754531253.malone@soybean.canonical.com> (raw)
In-Reply-To: 160848897234.4298.12739306431901820443.malonedeb@wampee.canonical.com

Ticket has been moved here (thanks, José!):
https://gitlab.com/qemu-project/qemu/-/issues/278
... thus closing this on Launchpad now.

** Bug watch added: gitlab.com/qemu-project/qemu/-/issues #278
   https://gitlab.com/qemu-project/qemu/-/issues/278

** Changed in: qemu
       Status: Incomplete => Invalid

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https://bugs.launchpad.net/bugs/1908832

Title:
  jack audio dev produces no sound

Status in QEMU:
  Invalid

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

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