Installed devices: pcm0: <Realtek ALC255 (Rear Analog Line-out)> (play) default pcm1: <Intel Kaby Lake (HDMI/DP 8ch)> (play) pcm2: <Intel Kaby Lake (HDMI/DP 8ch)> (play) pcm3: <Intel Kaby Lake (HDMI/DP 8ch)> (play) No devices installed from userspace.