我有一台华为 Matebook 13 2019，运行在 Ubuntu 20.04.3 LTS 上。BIOS 中的型号为 wrt-wx9，笔记本电脑上显示为 wrt-w19。GP108M [GeForce MX250] / Mesa Intel® UHD Graphics 620 (WHL GT2)。HDMI 通过 USB-C 适配器提供。视频显示良好，但未列出 HDMI 音频设备。笔记本电脑同时具有英特尔和 Nvidia GPU。在 ubuntu 中，我使用最新的 Nvidia 推荐驱动程序，并且首选 Nvidia。如果我选择英特尔，也会发生同样的事情。在 Windows 下，HDMI 音频显示为英特尔。谷歌搜索后尝试了不同的解决方案，但都不起作用。有什么建议吗？
输出pacmd list-cards
1 card(s) available. index: 0 name: <alsa_card.pci-0000_00_1f.3> driver: <module-alsa-card.c> owner module: 23 properties: alsa.card = "0" alsa.card_name = "HDA Intel PCH" alsa.long_card_name = "HDA Intel PCH at 0x9421c000 irq 145" alsa.driver_name = "snd_hda_intel" device.bus_path = "pci-0000:00:1f.3" sysfs.path = "/devices/pci0000:00/0000:00:1f.3/sound/card0" device.bus = "pci" device.vendor.id = "8086" device.vendor.name = "Intel Corporation" device.product.id = "9dc8" device.product.name = "Cannon Point-LP High Definition Audio Controller" device.form_factor = "internal" device.string = "0" device.description = "Innebygd lydenhet" module-udev-detect.discovered = "1" device.icon_name = "audio-card-pci" profiles: input:analog-stereo: Analog stereokanal inngang (priority 32833, available: unknown) output:analog-stereo: Analog stereokanal utgang (priority 39268, available: unknown) output:analog-stereo+input:analog-stereo: Analog stereodupleks (priority 39333, available: unknown) off: Av (priority 0, available: unknown) active profile: <output:analog-stereo+input:analog-stereo> sinks: alsa_output.pci-0000_00_1f.3.analog-stereo/#1: Innebygd lydenhet Analog stereokanal sources: alsa_output.pci-0000_00_1f.3.analog-stereo.monitor/#1: Monitor of Innebygd lydenhet Analog stereokanal alsa_input.pci-0000_00_1f.3.analog-stereo/#2: Innebygd lydenhet Analog stereokanal ports: analog-input-internal-mic: Intern mikrofon (priority 8900, latency offset 0 usec, available: unknown) properties: device.icon_name = "audio-input-microphone" analog-input-headphone-mic: Mikrofon (priority 8700, latency offset 0 usec, available: no) properties: device.icon_name = "audio-input-microphone" analog-input-headset-mic: Hodetelefon-mikrofon (priority 8800, latency offset 0 usec, available: no) properties: device.icon_name = "audio-input-microphone" analog-output-speaker: Høyttalere (priority 10000, latency offset 0 usec, available: unknown) properties: device.icon_name = "audio-speakers" analog-output-headphones: Hodetelefoner (priority 9900, latency offset 0 usec, available: no) properties: device.icon_name = "audio-headphones"
输出aplay -l
**** List of PLAYBACK Hardware Devices **** card 0: PCH [HDA Intel PCH], device 0: ALC256 Analog [ALC256 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0