Debugging Alsa HDA Audio

If you're using the snd-hda-intel module and you've got audio problems, you might want to try out manually using a specific model, the list is in e.g. patch_realtek.c:

11687 static const char *alc268_models[ALC268_MODEL_LAST] = {

11688 [ALC267_QUANTA_IL1] = "quanta-il1",

11689 [ALC268_3ST] = "3stack",

11690 [ALC268_TOSHIBA] = "toshiba",

11691 [ALC268_ACER] = "acer",

11692 [ALC268_ACER_DMIC] = "acer-dmic",

11693 [ALC268_ACER_ASPIRE_ONE] = "acer-aspire",

11694 [ALC268_DELL] = "dell",

11695 [ALC268_ZEPTO] = "zepto",

11696 #ifdef CONFIG_SND_DEBUG

11697 [ALC268_TEST] = "test",

11698 #endif

11699 [ALC268_AUTO] = "auto",

e.g.
sudo modprobe -r snd-hda-intel; sudo modprobe snd-hda-intel model=test

See here for more.