After installing Nvidia video driver, all sound stopped working. Attached is an image of the error message I get.

New-ish to Slackware and Linux in general. What can I try to fix the issue?

http://docs.slackware.com/howtos:har..._snd-hda-intel
I've tried this, but after rebooting it is still the same.

Thank you,
Erik

It looks like you have a system with multiple audio outputs.
There appears to be an onboard HDA Intel chipset with an ALC889 codec that is offering analog, digital and HDMI outputs as well as an HDMI output on your nVidia.
Perhaps this SlackDocs page can help. Also look at the discussion tab.
http://docs.slackware.com/howtos:har...s_on_slackware

~# cat /proc/asound/card*/codec* | grep Codec
Codec: Nvidia GPU 15 HDMI/DP
Codec: Nvidia GPU 15 HDMI/DP
Codec: Nvidia GPU 15 HDMI/DP
Codec: Nvidia GPU 15 HDMI/DP

:~# lsmod | grep snd
snd_seq_dummy 1455 0
snd_seq_oss 29048 0
snd_seq_midi_event 5620 1 snd_seq_oss
snd_seq 51265 5 snd_seq_midi_event,snd_seq_oss,snd_seq_dummy
snd_seq_device 5228 3 snd_seq,snd_seq_oss,snd_seq_dummy
snd_pcm_oss 39183 0
snd_mixer_oss 15404 1 snd_pcm_oss
snd_hda_codec_hdmi 24057 4
snd_hda_intel 23267 0
snd_hda_codec 81925 2 snd_hda_intel,snd_hda_codec_hdmi
snd_hwdep 6324 1 snd_hda_codec
snd_pcm 72864 4 snd_hda_codec,snd_hda_intel,snd_hda_codec_hdmi,snd_pcm_oss
snd_page_alloc 7081 2 snd_pcm,snd_hda_intel
snd_timer 18798 2 snd_pcm,snd_seq
snd 57796 11 snd_timer,snd_pcm,snd_hwdep,snd_hda_codec,snd_hda_intel,snd_hda_codec_hdmi,snd_mixer_oss,snd_pcm_oss ,snd_seq_device,snd_seq,snd_seq_oss
soundcore 5474 1 snd

~# cat /proc/asound/card*/codec* | grep Codec
Codec: Nvidia GPU 15 HDMI/DP
Codec: Nvidia GPU 15 HDMI/DP
Codec: Nvidia GPU 15 HDMI/DP
Codec: Nvidia GPU 15 HDMI/DP

:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 7: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 8: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 9: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0

:~# alsamixer
───────────────────────── AlsaMixer v1.0.26 ───────────────────────────┐
│ Card: HDA NVidia F1: Help │
│ Chip: Nvidia GPU 15 HDMI/DP F2: System information │
│ View: F3: Playback F4: Capture F5:[All] F6: Select sound card │
│ Item: S/PDIF [Off] Esc: Exit │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ ┌───── Sound Card ──────┐ │
│ │- (default) │ │
│ │0 HDA NVidia │ │
│ ┌──│ enter device name...│──┐ │
│ │MM└───────────────────────┘MM│ │
│ └──┘ └──┘ └──┘ └──┘ │
│ < S/PDIF >S/PDIF 1 S/PDIF 2 S/PDIF 3 │
│ │
│ │

................
Made the asound.conf file in /etc but it didnt seem to do anything.
Ideas?

Try, as root
and rebooting.
Hopefully this will allow your other device to be seen by the kernel. You may need to do this http://www.linuxquestions.org/questi...5/#post4289480 if your other device appears.

sorry, i feel silly. I had the sound disabled in the BIOS. ..Check the fuse they said..ha!