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Gentoo Forums :: View topic - snd-usb-audio: probe of ...
https://forums.gentoo.org/viewtopic-p-6886404.html
Bus 002 Device 003: ID 046d:0990 Logitech, Inc. QuickCam Pro 9000 Bus 004 Device 002: ID 0d8c:000c C-Media Electronics, Inc. Audio Adapter
sound - Bose USB speakers fail to load driver - Ask Ubuntu
https://askubuntu.com/questions/634874/bose-usb-speakers-fail-to-load-driver
This options tells the snd-usb-audio driver that when it loads, it must claim the first sound card index. However, If that sound card index is already used by some other driver ( snd-hda-intel in your case), loading fails. In theory, you would need to prevent such conflicts by telling all drivers which index to use.
Help Me Fix This: External USB Audio on Raspberry Pi 3
https://www.thouret.uk/2017/01/external-usb-audio-on-raspberry-pi-3.html
The rpi3 could see the USB audio device but not be able to enable it. The following errors were observed in dmesg: [ 4.214503] snd_bcm2835: unknown parameter 'index' ignored [ 4.470103] snd-usb-audio 1-1.2:1.0: cannot find the slot for index 0 (range 0-0), error: -16 [ 4.470134] usb 1-1.2: cannot create card instance 0
[SOLVED] Alsa does not find my sound ... - Arch Linux
https://bbs.archlinux.org/viewtopic.php?id=260373
options snd_usb_audio index=1 #Move the two snd_hda_intel cards and keep the integrated on 0 and the HDMI on 2 options snd_hda_intel index=0,2 Or if you don't want to hardcode these and just set a "preferred" index that should fall over to the next available one should it be occupied use negative indices
Usb-audio - Alsa Opensrc Org - Independent ALSA and …
https://alsa.opensrc.org/Usb-audio
Once the snd-usb-audio module is loaded, you'll see the 'Power LED' control in alsamixer. Muting it will set the LED to Blink and unmuting it will set it to On. For the volume knob, you need to use the alsa_usb driver with lirc. Lirc will receive events …
usb/sound: use-after-free in snd_usb_mixer_interrupt ...
It's a stray URB that isn't properly killed when the usb-audio mixer interface gets the error at probe. The patch below should fix it. I'm going to wrap up with a proper description later. thanks, Takashi --- Comments Andrey Konovalov Oct. 10, 2017, 11:20 a.m. UTC | #1
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