rebooted
alsamixer has been checked F6 selected onboard sound device, toggled mutes and sliders. no fix

Audio: Card-1 NVIDIA GK208 HDMI/DP Audio Controller driver: snd_hda_intel
Card-2 Advanced Micro Devices [AMD/ATI] SBx00 Azalia (Intel HDA) driver: snd_hda_intel
Card-3 Logitech QuickCam Messanger driver: USB Audio
Sound: Advanced Linux Sound Architecture v: k4.15.0-45-generic

checked my cables and tried headphones. nothing

pulsemixer config no longer shows onboard audio device


any ideas?

The first thing that comes to my mind is that maybe the sound card has gone west.

The first test I would try would be to boot to a Live CD of something not *buntu and seeing whether the sound works with it.

1 members found this post helpful.

good idea,
computer sound works well under Puppy via USB

Well, that definitely indicates it's software and not hardware.

When you say "pulsemixer" do you mean pavucontrol? If not, I'd recommend installing pavucontrol.

Otherwise, I haven't had to deal with anything like this; one hopes someone who has well join us here.

already installed & reinstalled

Did you check the sound settings with pacmd list-sinks ?

yes I did,
it only reports the HDMI (via gfx card) and USB webcam
not the onboard AC97

I'm going to try
#sudo update-initramfs -u
update-initramfs: Generating /boot/initrd.img-4.15.0-45-generic

in case the kernel is mismatched or not detecting the onboard sound

Which kernel modules have been loaded ?

lsmod (audio) ?

snd_usb_audio 204800 1
snd_usbmidi_lib 32768 1 snd_usb_audio
snd_hda_codec_hdmi 49152 1
snd_hda_codec_realtek 106496 1
snd_hda_codec_generic 73728 1 snd_hda_codec_realtek
snd_hda_intel 40960 6
snd_hda_codec 126976 4 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_realtek
snd_seq_midi 16384 0
snd_seq_midi_event 16384 1 snd_seq_midi
snd_hda_core 81920 5 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek
snd_rawmidi 32768 2 snd_seq_midi,snd_usbmidi_lib
snd_hwdep 20480 2 snd_usb_audio,snd_hda_codec
snd_pcm 98304 6 snd_hda_codec_hdmi,snd_hda_intel,snd_usb_audio,snd_hda_codec,snd_hda_core
snd_seq 65536 2 snd_seq_midi,snd_seq_midi_event
snd_seq_device 16384 3 snd_seq,snd_seq_midi,snd_rawmidi
snd_timer 32768 2 snd_seq,snd_pcm
snd 81920 26 snd_hda_codec_generic,snd_seq,snd_seq_device,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_usb_audi o,snd_usbmidi_lib,snd_hda_codec,snd_hda_codec_realtek,snd_timer,snd_pcm,snd_rawmidi
soundcore 16384 1 snd


Audio: Card-1 NVIDIA GK208 HDMI/DP Audio Controller driver: snd_hda_intel
Card-2 Advanced Micro Devices [AMD/ATI] SBx00 Azalia (Intel HDA) driver: snd_hda_intel
Card-3 Logitech QuickCam Messanger driver: USB Audio
Sound: Advanced Linux Sound Architecture v: k4.15.0-45-generic



progress
system is detecting snd_hda_intel
but only Analog Input is available for it, no analog output

alsactl restore
alsactl: state_lock:125: file /var/lib/alsa/asound.state lock error: File exists
alsactl: load_state:1683: Cannot open /var/lib/alsa/asound.state for reading: File exists
Found hardware: "HDA-Intel" "Realtek ALC892" "HDA:10ec0892,1458a182,00100302" "0x1458" "0xa182"
Hardware is initialized using a generic method
Found hardware: "HDA-Intel" "Nvidia GPU 51 HDMI/DP" "HDA:10de0051,38421733,00100100" "0x3842" "0x1733"
Hardware is initialized using a generic method
Found hardware: "USB-Audio" "USB Mixer" "USB046d:08da" "" ""

Can you post hardware info of the sound systems ?

what commands should I use ?

You should use the following command on console:

lspci -v | grep audio

Which version of Ubuntu are you using ?

1 members found this post helpful.

18.04.2 Xubuntu

lspci -v | grep audio
nothing

lspci -v | grep snd
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel

00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 Azalia (Intel HDA)
01:00.1 Audio device: NVIDIA Corporation GK208 HDMI/DP Audio Controller (rev a1)
Subsystem: eVga.com. Corp. GK208 HDMI/DP Audio Controller