Am using Debian 9.9 with Cinnamon 3.2.7. Linux Kernel 4.9.0-9-686-pae. Booted machine fresh a couple days ago, without any major changes to software or drivers to speak of, and suddenly sound does not work. Worked perfectly fine prior to the last restart. Pulseaudio shows the sound is un-muted.
Tested the speakers on windows machine and were functional, so not an issue with the hardware.
pavucontrol package, and sound is unmuted in there.
alsamixer and viewing '/proc/asound/version' shows:
Advanced Linux Sound Architecture Driver Version k4.9.0-9-686-pae.
lspci -v, showing current audio devices as:
00:1f.3 Audio device: Intel Corporation Device a2f0 Subsystem: Gigabyte Technology Co., Ltd Device a036 Flags: bus master, fast devsel, latency 32, IRQ 131 Memory at ed240000 (64-bit, non-prefetchable) [size=16K] Memory at ed220000 (64-bit, non-prefetchable) [size=64K] Capabilities: Kernel driver in use: snd_hda_intel Kernel modules: snd_hda_intel
02:00.1 Audio device: NVIDIA Corporation Device 10f1 (rev a1) Subsystem: eVga.com. Corp. Device 6161 Flags: bus master, fast devsel, latency 0, IRQ 18 Memory at ed080000 (32-bit, non-prefetchable) [size=16K] Capabilities: Kernel driver in use: snd_hda_intel Kernel modules: snd_hda_intel
Am unsure of what else to try or what could have suddenly caused this.