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jack audio dev produces no sound
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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