Morning all,
The motherboard sound chip failed, so I bought a USB sound adapter [1].
Problem: no sound: firefox says it isn't working and KDE sounds don't 'appear'.
I have all the likely-looking options set in the kernel (5.4.28), modules
where possible. I've read the Gentoo wiki articles on USB and audio, but they
didn't offer any help.
The device uses USB-2 and I have it in a USB-2 socket. I get this on plugging
it in:
$ dmesg -Hw
[Apr28 09:49] usb 3-13: new full-speed USB device number 17 using xhci_hcd
[ +0.127080] usb 3-13: New USB device found, idVendor=0d8c, idProduct=0014,
bcdDevice= 1.00
[ +0.000002] usb 3-13: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ +0.000002] usb 3-13: Product: USB Audio Device
[ +0.000001] usb 3-13: Manufacturer: C-Media Electronics Inc.
[ +0.007851] input: C-Media Electronics Inc. USB Audio Device as
/devices/pci0000:00/0000:00:14.0/usb3/3-13/3-13:1.3/0003:0D8C:0014.000D/input/input20
[ +0.051184] hid-generic 0003:0D8C:0014.000D: input,hidraw4: USB HID v1.00
Device [C-Media Electronics Inc. USB Audio Device] on usb-0000:00:14.0-13/input3
Some more diagnostics:
# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: HDMI [HDA ATI HDMI], device 3: Generic Digital [Generic Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: Device [USB Audio Device], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
# arecord -l
**** List of CAPTURE Hardware Devices ****
card 1: USB [HD Webcam USB], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: Device [USB Audio Device], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
# lsusb -t | grep -i audio
|__ Port 6: Dev 3, If 2, Class=Audio, Driver=snd-usb-audio, 480M
|__ Port 6: Dev 3, If 3, Class=Audio, Driver=snd-usb-audio, 480M
|__ Port 13: Dev 17, If 0, Class=Audio, Driver=snd-usb-audio, 12M
|__ Port 13: Dev 17, If 1, Class=Audio, Driver=snd-usb-audio, 12M
|__ Port 13: Dev 17, If 2, Class=Audio, Driver=snd-usb-audio, 12M
# lsmod | grep snd
snd_usb_audio 233472 0
snd_hwdep 16384 1 snd_usb_audio
snd_usbmidi_lib 28672 1 snd_usb_audio
snd_rawmidi 32768 1 snd_usbmidi_lib
snd_seq_device 16384 1 snd_rawmidi
mc 40960 4
videodev,snd_usb_audio,videobuf2_v4l2,videobuf2_common
snd_hda_codec_generic 77824 1
snd_hda_intel 28672 0
snd_intel_nhlt 16384 1 snd_hda_intel
snd_hda_codec 122880 2 snd_hda_codec_generic,snd_hda_intel
snd_hda_core 73728 3
snd_hda_codec_generic,snd_hda_intel,snd_hda_codec
snd_pcm 98304 4
snd_hda_intel,snd_usb_audio,snd_hda_codec,snd_hda_core
snd_timer 32768 1 snd_pcm
snd 81920 10
snd_hda_codec_generic,snd_seq_device,snd_hwdep,snd_hda_i>
soundcore 16384 1 snd
Why those Intel modules? The built-in Intel device is switched off in the BIOS.
Can anyone point me in the right direction?
1. The device is a 'Sabrent USB External Stereo Sound Adapter'; The blurb at
amazon.co.uk includes Linux in its list of OSes. I bought it via
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
--
Regards,
Peter.
