You might want to consider looking at hardware information and device drivers.
- Hardware information
It is always useful to include detailed information on your sound hardware when filing a sound-related problem. To produce this information, run this command:
$ alsa-info.sh --no-upload
It will generate a file containing detailed information about your sound hardware with the name /tmp/alsa-info.txt. Attach this file here (Ctrl + e to insert preformatted text).
- Check which Kernel driver is in use by PCI devices
To display kernel drivers handling each device, use the lspci (List PCI) command with the option -k.
$ sudo lspci -k