No sound over HDMI : KDE system with discrete NVIDIA

Hi, I have a KDE system on the testing branch with a discrete NVIDIA GPU. An HDMI cable is connected from the HDMI output of the GPU to an HDMI input of a TV. The system does not output sound over the HDMI output of the GPU. How can I get the system to output sound over the HDMI output of the GPU ? Thanks.

system information
inxi --no-host --filter-uuid --filter-vulnerabilities --verbosity 8
System:
  Kernel: 6.16.1-2-MANJARO arch: x86_64 bits: 64 compiler: gcc v: 15.2.1
    clocksource: tsc avail: acpi_pm
    parameters: BOOT_IMAGE=/@/boot/vmlinuz-6.16-x86_64 root=UUID=<filter> rw
    rootflags=subvol=@ quiet cryptdevice=UUID=<filter>
    root=/dev/mapper/luks-74ec4578-9beb-4e4f-9496-2994b6af8a5d splash
    udev.log_priority=3
  Desktop: KDE Plasma v: 6.3.6 tk: Qt v: N/A info: frameworks v: 6.17.0
    wm: kwin_wayland vt: 3 dm: SDDM Distro: Manjaro base: Arch Linux
Machine:
  Type: Desktop System: ASUS product: N/A v: N/A serial: <superuser required>
  Mobo: ASUSTeK model: ROG STRIX B760-I GAMING WIFI v: Rev 1.xx
    serial: <superuser required> part-nu: SKU uuid: <superuser required>
    UEFI: American Megatrends v: 1820 date: 05/15/2025
Battery:
  Message: No system battery data found. Is one present?
Memory:
  System RAM: total: 32 GiB available: 31.13 GiB used: 5.42 GiB (17.4%)
  Message: For most reliable report, use superuser + dmidecode.
  Array-1: capacity: 128 GiB slots: 2 modules: 2 EC: None
    max-module-size: 64 GiB note: est.
  Device-1: Controller0-DIMM0 type: DDR5 detail: synchronous size: 16 GiB
    speed: 5600 MT/s volts: curr: 1 min: 1 max: 1.25 width (bits): data: 64
    total: 64 manufacturer: Kingston part-no: KF556C40-16 serial: DC0A1135
  Device-2: Controller1-DIMM0 type: DDR5 detail: synchronous size: 16 GiB
    speed: 5600 MT/s volts: curr: 1 min: 1 max: 1.25 width (bits): data: 64
    total: 64 manufacturer: Kingston part-no: KF556C40-16 serial: 181A084E
PCI Slots:
  Permissions: Unable to run dmidecode. Root privileges required.
CPU:
  Info: model: 12th Gen Intel Core i5-12400F bits: 64 type: MT MCP
    arch: Alder Lake gen: core 12 level: v3 note: check built: 2021+
    process: Intel 7 (10nm ESF) family: 6 model-id: 0x97 (151) stepping: 2
    microcode: 0x3A
  Topology: cpus: 1x dies: 1 clusters: 6 cores: 6 threads: 12 tpc: 2
    smt: enabled cache: L1: 480 KiB desc: d-6x48 KiB; i-6x32 KiB L2: 7.5 MiB
    desc: 6x1.2 MiB L3: 18 MiB desc: 1x18 MiB
  Speed (MHz): avg: 600 min/max: 800/5600 scaling: driver: intel_pstate
    governor: powersave cores: 1: 600 2: 600 3: 600 4: 600 5: 600 6: 600 7: 600
    8: 600 9: 600 10: 600 11: 600 12: 600 bogomips: 59904
  Flags: 3dnowprefetch abm acpi adx aes aperfmperf apic arat
    arch_capabilities arch_lbr arch_perfmon art avx avx2 avx_vnni bmi1 bmi2
    bts clflush clflushopt clwb cmov constant_tsc cpuid cpuid_fault cx16 cx8
    de ds_cpl dtes64 dtherm dts epb ept ept_ad erms est f16c flexpriority
    flush_l1d fma fpu fsgsbase fsrm fxsr gfni hfi ht hwp hwp_act_window
    hwp_epp hwp_notify hwp_pkg_req ibpb ibrs ibrs_enhanced ibt ida intel_pt
    invpcid lahf_lm lm mca mce md_clear mmx monitor movbe movdir64b movdiri
    msr mtrr nonstop_tsc nopl nx ospke pae pat pbe pcid pclmulqdq pdcm
    pdpe1gb pebs pge pku pln pni popcnt pse pse36 pts rdpid rdrand rdseed
    rdtscp rep_good sdbg sep serialize sha_ni smap smep split_lock_detect ss
    ssbd sse sse2 sse4_1 sse4_2 ssse3 stibp syscall tm tm2 tpr_shadow tsc
    tsc_adjust tsc_deadline_timer tsc_known_freq umip user_shstk vaes vme vmx
    vnmi vpclmulqdq vpid waitpkg x2apic xgetbv1 xsave xsavec xsaveopt xsaves
    xtopology xtpr
  Vulnerabilities: <filter>
Graphics:
  Device-1: NVIDIA GA104 [GeForce RTX 3070 Ti] vendor: ZOTAC driver: nvidia
    v: 580.76.05 alternate: nouveau,nova_core,nvidia_drm non-free: 550-570.xx+
    status: current (as of 2025-04; EOL~2026-12-xx) arch: Ampere code: GAxxx
    process: TSMC n7 (7nm) built: 2020-2023 pcie: gen: 4 speed: 16 GT/s
    lanes: 16 ports: active: none off: HDMI-A-1 empty: DP-1,DP-2,DP-3
    bus-ID: 01:00.0 chip-ID: 10de:2482 class-ID: 0300
  Display: wayland server: X.org v: 1.21.1.18 with: Xwayland v: 24.1.8
    compositor: kwin_wayland driver: X: loaded: nvidia
    gpu: nv_platform,nvidia,nvidia-nvswitch display-ID: 0
  Monitor-1: HDMI-A-1 model: Union TV serial: 4096 built: 2018 res:
    mode: 1920x1080 hz: 60 scale: 100% (1) dpi: 40 gamma: 1.2 chroma: red:
    x: 0.627 y: 0.341 green: x: 0.278 y: 0.596 blue: x: 0.153 y: 0.071 white:
    x: 0.282 y: 0.298 size: 1209x680mm (47.6x26.77") diag: 1387mm (54.6")
    ratio: 16:9 modes: 1920x1080, 1600x1200, 1600x900, 1280x1024, 1280x960,
    1366x768, 1280x720, 1024x768, 800x600, 720x576, 720x480, 640x480
  API: EGL v: 1.5 hw: drv: nvidia platforms: device: 0 drv: nvidia device: 2
    drv: swrast gbm: drv: nvidia surfaceless: drv: nvidia wayland: drv: nvidia
    x11: drv: nvidia inactive: device-1
  API: OpenGL v: 4.6.0 compat-v: 4.5 vendor: nvidia mesa v: 580.76.05
    glx-v: 1.4 direct-render: yes renderer: NVIDIA GeForce RTX 3070 Ti/PCIe/SSE2
    memory: 7.81 GiB display-ID: :0.0
  API: Vulkan v: 1.4.321 layers: 2 device: 0 type: discrete-gpu name: NVIDIA
    GeForce RTX 3070 Ti driver: nvidia v: 580.76.05 device-ID: 10de:2482
    surfaces: N/A
  Info: Tools: api: clinfo, eglinfo, glxinfo, vulkaninfo
    de: kscreen-console,kscreen-doctor gpu: nvidia-settings,nvidia-smi
    wl: wayland-info x11: xdpyinfo,xprop
Audio:
  Device-1: Intel Raptor Lake High Definition Audio vendor: ASUSTeK
    driver: snd_hda_intel v: kernel alternate: snd_soc_avs,snd_sof_pci_intel_tgl
    bus-ID: 00:1f.3 chip-ID: 8086:7a50 class-ID: 0403
  Device-2: NVIDIA GA104 High Definition Audio vendor: ZOTAC
    driver: snd_hda_intel v: kernel alternate: nova_core pcie: gen: 4
    speed: 16 GT/s lanes: 16 bus-ID: 01:00.1 chip-ID: 10de:228b class-ID: 0403
  API: ALSA v: k6.16.1-2-MANJARO status: kernel-api with: aoss
    type: oss-emulator tools: alsactl,alsamixer,amixer
  Server-1: JACK v: 1.9.22 status: off tools: N/A
  Server-2: PipeWire v: 1.4.7 status: active with: 1: pipewire-pulse
    status: active 2: wireplumber status: active 3: pipewire-alsa type: plugin
    tools: pactl,pw-cat,pw-cli,wpctl
Network:
  Device-1: Intel Raptor Lake-S PCH CNVi WiFi driver: iwlwifi v: kernel
    bus-ID: 00:14.3 chip-ID: 8086:7a70 class-ID: 0280
  IF: wlp0s20f3 state: up mac: e8:c8:29:38:8f:e2
  IP v4: 192.168.50.158/24 type: dynamic noprefixroute scope: global
    broadcast: 192.168.50.255
  IP v6: fe80::b9b3:2122:2e2:f8c3/64 type: noprefixroute scope: link
  Device-2: Intel Ethernet I226-V vendor: ASUSTeK driver: igc v: kernel
    pcie: gen: 2 speed: 5 GT/s lanes: 1 port: N/A bus-ID: 05:00.0
    chip-ID: 8086:125c class-ID: 0200
  IF: enp5s0 state: down mac: 10:7c:61:4a:08:79
  Info: services: NetworkManager, sshd, systemd-timesyncd, wpa_supplicant
  WAN IP: 115.188.64.61
Bluetooth:
  Device-1: Intel AX211 Bluetooth driver: btusb v: 0.8 type: USB rev: 2.0
    speed: 12 Mb/s lanes: 1 mode: 1.1 bus-ID: 1-14:5 chip-ID: 8087:0033
    class-ID: e001
  Report: rfkill ID: hci0 rfk-id: 0 state: up address: see --recommends
Logical:
  Message: No logical block device data found.
  Device-1: luks-74ec4578-9beb-4e4f-9496-2994b6af8a5d maj-min: 253:0
    type: LUKS dm: dm-0 size: 953.57 GiB
  Components:
  p-1: nvme1n1p2 maj-min: 259:3 size: 953.57 GiB
RAID:
  Hardware-1: Intel Volume Management Device NVMe RAID Controller driver: vmd
    v: 0.6 port: N/A bus-ID: 00:0e.0 chip-ID: 8086:467f rev: class-ID: 0104
Drives:
  Local Storage: total: 1.86 TiB used: 645.35 GiB (33.8%)
  SMART Message: Unable to run smartctl. Root privileges required.
  ID-1: /dev/nvme0n1 maj-min: 259:1 vendor: Kingston model: SKC3000S1024G
    size: 953.87 GiB block-size: physical: 512 B logical: 512 B speed: 63.2 Gb/s
    lanes: 4 tech: SSD serial: 50026B76867D4041 fw-rev: EIFK31.6 temp: 30.9 C
    scheme: GPT
  ID-2: /dev/nvme1n1 maj-min: 259:0 vendor: Kingston model: SKC3000S1024G
    size: 953.87 GiB block-size: physical: 512 B logical: 512 B speed: 63.2 Gb/s
    lanes: 4 tech: SSD serial: 50026B7283376A58 fw-rev: EIFK31.6 temp: 33.9 C
    scheme: GPT
  Message: No optical or floppy data found.
Partition:
  ID-1: / raw-size: 953.57 GiB size: 953.57 GiB (100.00%)
    used: 645.32 GiB (67.7%) fs: btrfs dev: /dev/dm-0 maj-min: 253:0
    mapped: luks-74ec4578-9beb-4e4f-9496-2994b6af8a5d label: N/A
    uuid: <filter>
  ID-2: /boot/efi raw-size: 300 MiB size: 299.4 MiB (99.80%)
    used: 31.9 MiB (10.6%) fs: vfat dev: /dev/nvme1n1p1 maj-min: 259:2
    label: N/A uuid: <filter>
  ID-3: /home raw-size: 953.57 GiB size: 953.57 GiB (100.00%)
    used: 645.32 GiB (67.7%) fs: btrfs dev: /dev/dm-0 maj-min: 253:0
    mapped: luks-74ec4578-9beb-4e4f-9496-2994b6af8a5d label: N/A
    uuid: <filter>
  ID-4: /swap raw-size: 953.57 GiB size: 953.57 GiB (100.00%)
    used: 645.32 GiB (67.7%) fs: btrfs dev: /dev/dm-0 maj-min: 253:0
    mapped: luks-74ec4578-9beb-4e4f-9496-2994b6af8a5d label: N/A
    uuid: <filter>
  ID-5: /var/cache raw-size: 953.57 GiB size: 953.57 GiB (100.00%)
    used: 645.32 GiB (67.7%) fs: btrfs dev: /dev/dm-0 maj-min: 253:0
    mapped: luks-74ec4578-9beb-4e4f-9496-2994b6af8a5d label: N/A
    uuid: <filter>
  ID-6: /var/log raw-size: 953.57 GiB size: 953.57 GiB (100.00%)
    used: 645.32 GiB (67.7%) fs: btrfs dev: /dev/dm-0 maj-min: 253:0
    mapped: luks-74ec4578-9beb-4e4f-9496-2994b6af8a5d label: N/A
    uuid: <filter>
Swap:
  Kernel: swappiness: 60 (default) cache-pressure: 100 (default) zswap: yes
    compressor: zstd max-pool: 20%
  ID-1: swap-1 type: file size: 6 GiB used: 0 KiB (0.0%) priority: -2
    file: /swap/swapfile
Unmounted:
  ID-1: /dev/nvme0n1p1 maj-min: 259:4 size: 16 MiB fs: <superuser required>
    label: N/A uuid: N/A
  ID-2: /dev/nvme0n1p2 maj-min: 259:5 size: 953.16 GiB fs: bitlocker
    label: WINDOWS C: 07/02/2025 uuid: <filter>
  ID-3: /dev/nvme0n1p3 maj-min: 259:6 size: 713 MiB fs: ntfs label: N/A
    uuid: <filter>
USB:
  Hub-1: 1-0:1 info: hi-speed hub with single TT ports: 16 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
    class-ID: 0900
  Device-1: 1-2:2 info: ASUSTek AURA LED Controller type: HID
    driver: hid-generic,usbhid interfaces: 2 rev: 2.0 speed: 12 Mb/s (1.4 MiB/s)
    lanes: 1 mode: 1.1 power: 16mA chip-ID: 0b05:19af class-ID: 0300
    serial: 9876543210
  Hub-2: 1-3:3 info: ASMedia ASM1074 High-Speed hub ports: 4 rev: 2.1
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 power: 100mA
    chip-ID: 174c:2074 class-ID: 0900
  Device-1: 1-11:4 info: Lenovo Essential Wireless Keyboard and Mouse Combo
    type: keyboard,mouse,HID driver: hid-generic,usbhid interfaces: 4 rev: 2.0
    speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1 power: 100mA
    chip-ID: 17ef:60a9 class-ID: 0300
  Device-2: 1-14:5 info: Intel AX211 Bluetooth type: bluetooth driver: btusb
    interfaces: 2 rev: 2.0 speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1
    power: 100mA chip-ID: 8087:0033 class-ID: e001
  Hub-3: 2-0:1 info: super-speed hub ports: 9 rev: 3.1
    speed: 20 Gb/s (2.33 GiB/s) lanes: 2 mode: 3.2 gen-2x2 chip-ID: 1d6b:0003
    class-ID: 0900
  Hub-4: 2-2:2 info: ASMedia ASM1074 SuperSpeed hub ports: 4 rev: 3.0
    speed: 5 Gb/s (596.0 MiB/s) lanes: 1 mode: 3.2 gen-1x1 power: 8mA
    chip-ID: 174c:3074 class-ID: 0900
Sensors:
  System Temperatures: cpu: 32.0 C mobo: N/A
  Fan Speeds (rpm): N/A
Repos:
  Packages: pm: pacman pkgs: 1371 libs: 366 tools: pamac pm: flatpak pkgs: 0
  Active pacman repo servers in: /etc/pacman.d/mirrorlist
    1: https://mirrors.manjaro.org/repo/testing/$repo/$arch
    2: https://mirrors.cicku.me/manjaro/testing/$repo/$arch
    3: https://mirrors2.manjaro.org/testing/$repo/$arch
Processes:
  CPU top: 5 of 351
  1: cpu: 23.6% command: js-language-service.js started-by: node pid: 7019
    mem: 287.4 MiB (0.9%)
  2: cpu: 20.4% command: webstorm pid: 1558 mem: 2366.4 MiB (7.4%)
  3: cpu: 7.2% command: firefox pid: 3877 mem: 770.6 MiB (2.4%)
  4: cpu: 4.0% command: kwin_wayland pid: 1085 mem: 281.0 MiB (0.8%)
  5: cpu: 3.0% command: js-language-service.js started-by: node pid: 2758
    mem: 540.7 MiB (1.6%)
  Memory top: 5 of 351
  1: mem: 2366.4 MiB (7.4%) command: webstorm pid: 1558 cpu: 20.4%
  2: mem: 770.6 MiB (2.4%) command: firefox pid: 3877 cpu: 7.2%
  3: mem: 540.7 MiB (1.6%) command: js-language-service.js started-by: node
    pid: 2758 cpu: 3.0%
  4: mem: 422.2 MiB (1.3%) command: plasmashell pid: 1263 cpu: 0.2%
  5: mem: 321.1 MiB (1.0%) command: konsole pid: 4826 cpu: 1.0%
Info:
  Processes: 351 Power: uptime: 39m states: freeze,mem,disk suspend: deep
    avail: s2idle wakeups: 0 hibernate: platform avail: shutdown, reboot,
    suspend, test_resume image: 12.4 GiB services: org_kde_powerdevil,
    power-profiles-daemon, upowerd Init: systemd v: 257 default: graphical
    tool: systemctl
  Compilers: clang: 20.1.8 gcc: 15.2.1 alt: 14 Shell: Zsh v: 5.9
    default: Bash v: 5.3.3 running-in: konsole inxi: 3.3.38```

It appears that you have not selected it. On my system the top radio button selects the HDMI sound, the second selects the integrated audio from the main board. I can select either and the sound output responds appropriately

1 Like

Thank you ! That is an easy (and for me, embarassing) fix. I only just now noticed that the first radio button has an (obscured) HDMI reference at the end of its title.

1 Like

It was my pleasure, you are very welcome.

This topic was automatically closed 3 days after the last reply. New replies are no longer allowed.