Simultaneous output on speakers and headphone

The headphone is recognized but sound come from both headphone and speaker.
Ubuntu has not such problem

below is inxi -Fxxxz --no-host
(But I’m noob)

# inxi -Fxxxz --no-host
  Kernel: 5.15.13-arch1-1 x86_64 bits: 64 compiler: gcc v: 11.1.0
    Desktop: Xfce 4.16.0 tk: Gtk 3.24.29 info: xfce4-panel wm: xfwm 4.16.1
    dm: LightDM 1.30.0 Distro: EndeavourOS base: Arch Linux
  Type: Portable System: Dell product: MM061 v: N/A serial: <filter> Chassis:
    type: 8 serial: <filter>
  Mobo: Dell model: 0XD720 serial: <filter> BIOS: Dell v: A17
    date: 06/13/2007
  Info: dual core model: Intel Core2 T7600 bits: 64 type: MCP
    smt: <unsupported> arch: Core Merom rev: 6 cache: L1: 128 KiB L2: 4 MiB
  Speed (MHz): avg: 1000 min/max: 1000/2333 volts: 3.3 V ext-clock: 166 MHz
    cores: 1: 1000 2: 1000 bogomips: 9313
  Flags: ht lm nx pae sse sse2 sse3 ssse3 vmx
  Device-1: AMD RV515/M54 [Mobility Radeon X1400] vendor: Dell driver: radeon
    v: kernel bus-ID: 01:00.0 chip-ID: 1002:7145 class-ID: 0300
  Display: server: X.Org compositor: xfwm4 v: 4.16.1 driver:
    loaded: ati,radeon unloaded: modesetting alternate: fbdev,vesa resolution:
    1: 1280x1024~60Hz 2: 1280x800~60Hz s-dpi: 96
  OpenGL: renderer: ATI RV515 v: 2.1 Mesa 21.3.3 direct render: Yes
  Device-1: Intel NM10/ICH7 Family High Definition Audio vendor: Dell
    driver: snd_hda_intel v: kernel bus-ID: 00:1b.0 chip-ID: 8086:27d8
    class-ID: 0403
  Sound Server-1: ALSA v: k5.15.13-arch1-1 running: yes
  Sound Server-2: JACK v: 1.9.19 running: no
  Sound Server-3: PulseAudio v: 15.0 running: yes
  Sound Server-4: PipeWire v: 0.3.43 running: no
  Device-1: Broadcom BCM4401-B0 100Base-TX vendor: Dell Inspiron 6400
    driver: b44 v: kernel port: N/A bus-ID: 03:00.0 chip-ID: 14e4:170c
    class-ID: 0200
  Device-2: Broadcom BCM4311 802.11b/g WLAN vendor: Dell Wireless 1390
    driver: b43-pci-bridge v: N/A bus-ID: 0b:00.0 chip-ID: 14e4:4311
    class-ID: 0280
  IF-ID-1: eth0 state: down mac: <filter>
  IF-ID-2: tun0 state: unknown speed: 10 Mbps duplex: full mac: N/A
  IF-ID-3: wlan0 state: up mac: <filter>
  Device-1: Dell Wireless 355 Bluetooth type: USB driver: btusb v: 0.8
    bus-ID: 5-2:3 chip-ID: 413c:8126 class-ID: fe01
  Report: rfkill ID: hci0 rfk-id: 0 state: down bt-service: disabled
    rfk-block: hardware: no software: no address: see --recommends
  Local Storage: total: 111.79 GiB used: 12.8 GiB (11.5%)
  ID-1: /dev/sda vendor: Hikvision model: HS-SSD-C100 120G size: 111.79 GiB
    speed: <unknown> type: SSD serial: <filter> rev: 985 scheme: MBR
  ID-1: / size: 47.75 GiB used: 12.8 GiB (26.8%) fs: ext4 dev: /dev/sda6
  Alert: No swap data was found.
  System Temperatures: cpu: 56.0 C mobo: N/A sodimm: SODIMM C
  Fan Speeds (RPM): cpu: 3842
  Processes: 179 Uptime: 22m wakeups: 1 Memory: 3.16 GiB
  used: 1.83 GiB (58.0%) Init: systemd v: 250 Compilers: gcc: 11.1.0
  Packages: pacman: 875 Shell: Bash (su) v: 5.1.12 running-in: xfce4-terminal
  inxi: 3.3.11