Hi,
I spend some time debugging this during the morning, I found that there is a
check
while connecting the ports that always exits the function without connecting the
jack ports, simplifying it as in the following diff lets me build and use the
audio outputs correctly in the vm:
diff --git a/audio/jackaudio.c b/audio/jackaudio.c
index 3b7c18443d..f417e4db8a 100644
--- a/audio/jackaudio.c
+++ b/audio/jackaudio.c
@@ -369,7 +369,7 @@ static size_t qjack_read(HWVoiceIn *hw, void *buf, size_t
len)
static void qjack_client_connect_ports(QJackClient *c)
{
- if (!c->connect_ports || !c->opt->connect_ports) {
+ if (!c->connect_ports) {
return;
}
So, I wonder, what is this c->opt->connect_ports all about, is it needed, or
just
wrongly initialized so that it caps the port connection?
Thanks!
Jose.
--
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
