Centos
HDMI 沒有音頻？
我使用的是 CentOS 7.9，我有 Asus H110M-E（內置音頻和影片）和 GeForce GT 710 顯卡，驅動程序通過以下方式安裝
yum：(1/4): nvidia-x11-drv-470.103.01-1.el7_9.elrepo.x86_64.rpm | 4.5 MB 00:00:02 (2/4): kmod-nvidia-470.103.01-1.el7_9.elrepo.x86_64.rpm | 48 MB 00:00:03 (3/4): yum-plugin-nvidia-1.0.2-1.el7.elrepo.noarch.rpm | 12 kB 00:00:00 (4/4): nvidia-x11-drv-libs-470.103.01-1.el7_9.elrepo.x86_64.rpm而且我沒有使用最新的（510 版），因為 Nvidia 在 GeForce GT 710 的 470 版之後取消了支持。
我正在嘗試使用 GeForce GT 710 的 HDMI 將音頻也輸出到我的三星電視。
但是，沒有音頻（只有影片）。我查看了
dmesg，這些行看起來很可疑：[ 3.194768] asus_wmi: Disabling ACPI video driver [ 3.218574] AVX2 version of gcm_enc/dec engaged. [ 3.218576] AES CTR mode by8 optimization enabled [ 3.226895] alg: No test for __gcm-aes-aesni (__driver-gcm-aes-aesni) [ 3.226930] alg: No test for __generic-gcm-aes-aesni (__driver-generic-gcm-aes-aesni) [ 3.242290] snd_hda_intel 0000:00:1f.3: enabling device (0000 -> 0002) [ 3.242459] snd_hda_intel 0000:01:00.1: Disabling MSI [ 3.242464] snd_hda_intel 0000:01:00.1: Handle vga_switcheroo audio client [ 3.265463] snd_hda_intel 0000:00:1f.3: irq 125 for MSI/MSI-X [ 3.300528] snd_hda_codec_realtek hdaudioC0D0: autoconfig for ALC887-VD: line_outs=1 (0x14/0x0/0x0/0x0/0x0) type:line [ 3.300532] snd_hda_codec_realtek hdaudioC0D0: speaker_outs=0 (0x0/0x0/0x0/0x0/0x0) [ 3.300534] snd_hda_codec_realtek hdaudioC0D0: hp_outs=1 (0x1b/0x0/0x0/0x0/0x0) [ 3.300536] snd_hda_codec_realtek hdaudioC0D0: mono: mono_out=0x0 [ 3.300538] snd_hda_codec_realtek hdaudioC0D0: dig-out=0x11/0x0 [ 3.300540] snd_hda_codec_realtek hdaudioC0D0: inputs: [ 3.300542] snd_hda_codec_realtek hdaudioC0D0: Front Mic=0x19 [ 3.300544] snd_hda_codec_realtek hdaudioC0D0: Rear Mic=0x18 [ 3.300546] snd_hda_codec_realtek hdaudioC0D0: Line=0x1a [ 3.301579] kvm: disabled by bios [ 3.314616] kvm: disabled by bios [ 3.316354] intel_rapl: Found RAPL domain package [ 3.316358] intel_rapl: Found RAPL domain core [ 3.316360] intel_rapl: Found RAPL domain uncore [ 3.316362] intel_rapl: Found RAPL domain dram [ 3.330539] snd_hda_codec_hdmi hdaudioC0D2: No i915 binding for Intel HDMI/DP codec [ 3.332496] kvm: disabled by bios [ 3.332523] hdaudio hdaudioC0D2: Unable to bind the codec [ 3.333055] resource sanity check: requesting [mem 0xfdffe800-0xfe0007ff], which spans more than pnp 00:07 [mem 0xfdb00000-0xfdffffff] [ 3.333058] caller pmc_core_probe+0x8f/0x1000 [intel_pmc_core] mapping multiple BARs [ 3.333065] intel_pmc_core: initializedGeForce GT 710 上的 HDMI 音頻似乎被抑制了。有沒有辦法解決它？
aplay檢測 HDMI 音頻設備（但我不確定它是我的顯卡還是主機板上的內置影片設備）：$ sudo aplay -l **** List of PLAYBACK Hardware Devices **** card 0: PCH [HDA Intel PCH], device 0: ALC887-VD Analog [ALC887-VD Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: PCH [HDA Intel PCH], device 1: ALC887-VD Digital [ALC887-VD Digital] Subdevices: 1/1 Subdevice #0: subdevice #0 card 1: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0] Subdevices: 1/1 Subdevice #0: subdevice #0 card 1: NVidia [HDA NVidia], device 7: HDMI 1 [HDMI 1] Subdevices: 1/1 Subdevice #0: subdevice #0查看檢測到的音效卡的另一種方法：
$ cat /proc/asound/cards 0 [PCH ]: HDA-Intel - HDA Intel PCH HDA Intel PCH at 0xf7220000 irq 125 1 [NVidia ]: HDA-Intel - HDA NVidia HDA NVidia at 0xf7080000 irq 17
lspci還將我的 Nvidia 卡視為音頻設備：$ lspci | grep -i "NVIDIA" 01:00.0 VGA compatible controller: NVIDIA Corporation GK208B [GeForce GT 710] (rev a1) 01:00.1 Audio device: NVIDIA Corporation GK208 HDMI/DP Audio Controller (rev a1)謝謝！
您需要實際選擇輸出。在 Pulseaudio 下，您可以
pavucontrol對應用程序執行此操作，即使應用程序本身不支持它。