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On Tue, Apr 28, 2020 at 2:43 AM Peter Humphrey <peter@××××××××××××.uk> |
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wrote: |
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> |
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> Morning all, |
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> |
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> The motherboard sound chip failed, so I bought a USB sound adapter [1]. |
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> Problem: no sound: firefox says it isn't working and KDE sounds don't |
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'appear'. |
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> I have all the likely-looking options set in the kernel (5.4.28), modules |
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> where possible. I've read the Gentoo wiki articles on USB and audio, but |
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they |
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> didn't offer any help. |
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<SNIP> |
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> # aplay -l |
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> **** List of PLAYBACK Hardware Devices **** |
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> card 0: HDMI [HDA ATI HDMI], device 3: Generic Digital [Generic Digital] |
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> Subdevices: 1/1 |
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> Subdevice #0: subdevice #0 |
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> card 2: Device [USB Audio Device], device 0: USB Audio [USB Audio] |
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> Subdevices: 1/1 |
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> Subdevice #0: subdevice #0 |
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> |
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> # arecord -l |
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> **** List of CAPTURE Hardware Devices **** |
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> card 1: USB [HD Webcam USB], device 0: USB Audio [USB Audio] |
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> Subdevices: 1/1 |
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> snd_seq_device 16384 1 snd_rawmidi |
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> mc 40960 4 |
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videodev,snd_usb_audio,videobuf2_v4l2,videobuf2_common |
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> snd_hda_codec_generic 77824 1 |
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> snd_hda_intel 28672 0 |
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> snd_intel_nhlt 16384 1 snd_hda_intel |
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> snd_hda_codec 122880 2 snd_hda_codec_generic,snd_hda_intel |
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> snd_hda_core 73728 3 |
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snd_hda_codec_generic,snd_hda_intel,snd_hda_codec |
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> snd_pcm 98304 4 |
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snd_hda_intel,snd_usb_audio,snd_hda_codec,snd_hda_core |
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> snd_timer 32768 1 snd_pcm |
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> snd 81920 10 |
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snd_hda_codec_generic,snd_seq_device,snd_hwdep,snd_hda_i> |
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> soundcore 16384 1 snd |
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> |
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> Why those Intel modules? The built-in Intel device is switched off in the |
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BIOS. |
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> |
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|
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Because your video card probably makes sound available to send to your TV |
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over HDMI and it uses the Intel driver, or because the BIOS switch wasn't |
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honored by the kernel. |
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|
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> Can anyone point me in the right direction? |
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> |
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> 1. The device is a 'Sabrent USB External Stereo Sound Adapter'; The |
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blurb at amazon.co.uk includes Linux in its list of OSes. I bought it via |
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https://smile.amazon.co.uk/Sabrent-External-Adapter-Windows-AU-MMSA/dp/B00IRVQ0F8/ref=sr_1_3?dchild=1&keywords=usb+sound&qid=1588065420&sr=8-3 |
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Please provide the output of |
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ls /proc/asound |
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cat /proc/asound/cards |
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cat /proc/asound/modules |
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1) First, if you really don't want the intel stuff loaded then either don't |
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build it in your kernel or (easier - it's what I do) just blacklist the |
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intel sound driver. The following link has some instructions which explain |
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the process. |
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https://www.techtimejourney.net/how-to-blacklist-a-sound-card-in-linux/ |
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Restart Alsa and double check the cards and modules shown in /proc/asound. |
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2) As you are on KDE you likely have pulseaudio running. Run pavucontrol, |
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run Firefox with some audio and see where you are sending Firefox audio. |
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3) You probably don't have to mess with Alsa configuration itself to fix |
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this so keep it simple for now. We can go there later if need be. |
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Mark |
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