Arch Linux

Is the pulseaudio daemon running? And is X running?

Well the documentation for the arch linux pulseaudio has been clear to me : if there are a systemd, then I shouldn't daemonize. And X is running.

Pulse needs to be running in the systemd user session, though. Check systemctl status.

when running systemctl status pulseaudio.service on both of my Arch install it says : not-found (reason : no such file or directory).

It's a user service, not a system service. Just run `systemctl status` alone to get an overview, or use systemctl --user to check things specifically.

I found it and it says /usr/bin/pulseaudio --daemonize=no. What shoudl I do ?

What do you mean "found"? Is it running in the user session?

systemctl status pulseaudio
● pulseaudio.service
Loaded: not-found (Reason: No such file or directory)
Active: inactive (dead)

systemctl --user
UNIT LOAD ACTIVE SUB DESCRIPTION
sys-devices-pci0000:00-0000:00:02.0-drm-card0-card0\x2deDP\x2d1-intel_backlight.device loaded active plugged /sys/devices/p
sys-devices-pci0000:00-0000:00:03.0-sound-card0.device loaded active plugged Haswell-ULT HD Audio Controller
sys-devices-pci0000:00-0000:00:14.0-usb2-2\x2d5-2\x2d5:1.0-host3-target3:0:0-3:0:0:0-block-sdb.device loaded active plugged
sys-devices-pci0000:00-0000:00:14.0-usb2-2\x2d8-2\x2d8:1.0-bluetooth-hci0.device loaded active plugged /sys/devices/pci0000
sys-devices-pci0000:00-0000:00:1b.0-sound-card1.device loaded active plugged 8 Series HD Audio Controller
sys-devices-pci0000:00-0000:00:1c.2-0000:02:00.0-net-wlp2s0.device loaded active plugged BCM43142 802.11b/g/n
sys-devices-pci0000:00-0000:00:1c.3-0000:03:00.0-net-enp3s0.device loaded active plugged RTL8111/8168/8411 PCI Express Giga
sys-devices-pci0000:00-0000:00:1f.2-ata1-host0-target0:0:0-0:0:0:0-block-sda-sda1.device loaded active plugged ST1000LM024_
sys-devices-pci0000:00-0000:00:1f.2-ata1-host0-target0:0:0-0:0:0:0-block-sda-sda2.device loaded active plugged ST1000LM024_
sys-devices-pci0000:00-0000:00:1f.2-ata1-host0-target0:0:0-0:0:0:0-block-sda-sda3.device loaded active plugged ST1000LM024_
sys-devices-pci0000:00-0000:00:1f.2-ata1-host0-target0:0:0-0:0:0:0-block-sda.device loaded active plugged ST1000LM024_HN-M1
sys-devices-pci0000:00-0000:00:1f.2-ata3-host2-target2:0:0-2:0:0:0-block-sr0.device loaded active plugged HL-DT-ST_DVDRAM_G
sys-devices-platform-serial8250-tty-ttyS0.device loaded active plugged /sys/devices/platform/serial8250/tty/ttyS0
sys-devices-platform-serial8250-tty-ttyS1.device loaded active plugged /sys/devices/platform/serial8250/tty/ttyS1
sys-devices-platform-serial8250-tty-ttyS2.device loaded active plugged /sys/devices/platform/serial8250/tty/ttyS2
sys-devices-platform-serial8250-tty-ttyS3.device loaded active plugged /sys/devices/platform/serial8250/tty/ttyS3
sys-devices-virtual-misc-rfkill.device loaded active plugged /sys/devices/virtual/misc/rfkill
UNIT LOAD ACTIVE SUB DESCRIPTION
sys-devices-pci0000:00-0000:00:02.0-drm-card0-card0\x2deDP\x2d1-intel_backlight.device loaded active plugged /sys/devices/p
sys-devices-pci0000:00-0000:00:03.0-sound-card0.device loaded active plugged Haswell-ULT HD Audio Controller
sys-devices-pci0000:00-0000:00:14.0-usb2-2\x2d5-2\x2d5:1.0-host3-target3:0:0-3:0:0:0-block-sdb.device loaded active plugged
sys-devices-pci0000:00-0000:00:14.0-usb2-2\x2d8-2\x2d8:1.0-bluetooth-hci0.device loaded active plugged /sys/devices/pci0000
sys-devices-pci0000:00-0000:00:1b.0-sound-card1.device loaded active plugged 8 Series HD Audio Controller
sys-devices-pci0000:00-0000:00:1c.2-0000:02:00.0-net-wlp2s0.device loaded active plugged BCM43142 802.11b/g/n
sys-devices-pci0000:00-0000:00:1c.3-0000:03:00.0-net-enp3s0.device loaded active plugged RTL8111/8168/8411 PCI Express Giga
sys-devices-pci0000:00-0000:00:1f.2-ata1-host0-target0:0:0-0:0:0:0-block-sda-sda1.device loaded active plugged ST1000LM024_
sys-devices-pci0000:00-0000:00:1f.2-ata1-host0-target0:0:0-0:0:0:0-block-sda-sda2.device loaded active plugged ST1000LM024_
sys-devices-pci0000:00-0000:00:1f.2-ata1-host0-target0:0:0-0:0:0:0-block-sda-sda3.device loaded active plugged ST1000LM024_
sys-devices-pci0000:00-0000:00:1f.2-ata1-host0-target0:0:0-0:0:0:0-block-sda.device loaded active plugged ST1000LM024_HN-M1
sys-devices-pci0000:00-0000:00:1f.2-ata3-host2-target2:0:0-2:0:0:0-block-sr0.device loaded active plugged HL-DT-ST_DVDRAM_G
sys-devices-platform-serial8250-tty-ttyS0.device loaded active plugged /sys/devices/platform/serial8250/tty/ttyS0
sys-devices-platform-serial8250-tty-ttyS1.device loaded active plugged /sys/devices/platform/serial8250/tty/ttyS1
sys-devices-platform-serial8250-tty-ttyS2.device loaded active plugged /sys/devices/platform/serial8250/tty/ttyS2
sys-devices-platform-serial8250-tty-ttyS3.device loaded active plugged /sys/devices/platform/serial8250/tty/ttyS3
sys-devices-virtual-misc-rfkill.device loaded active plugged /sys/devices/virtual/misc/rfkill
sys-module-configfs.device loaded active plugged /sys/module/configfs
sys-module-fuse.device loaded active plugged /sys/module/fuse
sys-subsystem-bluetooth-devices-hci0.device loaded active plugged /sys/subsystem/bluetooth/devices/hci0
sys-subsystem-net-devices-enp3s0.device loaded active plugged RTL8111/8168/8411 PCI Express Gigabit Ethernet Con
sys-subsystem-net-devices-wlp2s0.device loaded active plugged BCM43142 802.11b/g/n
-.mount loaded active mounted /
boot.mount loaded active mounted /boot
dev-hugepages.mount loaded active mounted /dev/hugepages
dev-mqueue.mount loaded active mounted /dev/mqueue
proc-sys-fs-binfmt_misc.mount loaded active mounted /proc/sys/fs/binfmt_misc
run-user-1000-gvfs.mount loaded active mounted /run/user/1000/gvfs
run-user-1000.mount loaded active mounted /run/user/1000
sys-fs-fuse-connections.mount loaded active mounted /sys/fs/fuse/connections
sys-kernel-config.mount loaded active mounted /sys/kernel/config
sys-kernel-debug.mount loaded active mounted /sys/kernel/debug
tmp.mount loaded active mounted /tmp
init.scope loaded active running System and Service Manager
dbus.service loaded active running D-Bus User Message Bus
gvfs-daemon.service loaded active running Virtual filesystem service
pulseaudio.service loaded active running Sound Service
-.slice loaded active active Root Slice
dbus.socket loaded active running D-Bus User Message Bus Socket
pulseaudio.socket loaded active running Sound System
dev-sda3.swap loaded active active /dev/sda3
basic.target loaded active active Basic System
default.target loaded active active Default
paths.target loaded active active Paths
sockets.target loaded active active Sockets
timers.target loaded active active Timers

LOAD = Reflects whether the unit definition was properly loaded.
ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
SUB = The low-level unit activation state, values depend on unit type.

46 loaded units listed. Pass --all to see loaded but inactive units, too.
To show all installed unit files use 'systemctl list-unit-files'.

So after all of the, yes, the pulseaudio daemon is running. So much trouble for a simple question.

Well my question is : is it normal despite the daemon running that the output of the command pax11publish is null ? Which leads to the problem : my cookie file is unusable and I can't stream sound on any of my Arch Linux installation.

This might be relevant:
https://askubuntu.com/questions/1379216/pax11publish-on-ubuntu-20-04

Quoting verbatim from first answer:
"
This is a consequence of the removal of gconf support (which - as it appears - has been marked as deprecated for some time). Good new is, there is a much better solution: On a running system, simply enter (parameters shown work for me): $ pacmd load-module module-tunnel-sink-new server=192.168.1.5
sink_name=Remote channels=2 rate=48000 The remote device appears beside the local sink (output) devices, so these stay available for selection. Problem solved.
"

Could you check if the proposed solution works for you?

The symptom mentioned in OP is by design. There are alternative solutions to stream PulseAudio output.