Thank you so much!!! This solved my issue. Cheers! # My software versions and GPU. unRAID 6.6.7 Ubuntu 18.04.2 LTS Virtual Machine GPU pass-through with 'ASUS GeForce GTX 1050 Ti PH-GTX1050TI-4G' # From within the Ubuntu Guest OS, I did the following:  Created the file. sudo touch /etc/modprobe.d/snd-hda-intel.conf  Opened the file with nano text editor. sudo nano /etc/modprobe.d/snd-hda-intel.conf  Added the following line, saved, and closed. options snd-hda-intel enable_msi=1  Rebooted and issue was fixed!!!