Cfxtrjtrk

Dummy output is showing in Settings -> Sound in Ubuntu 18.04.

^{Dummy Output}

I tried:

sudo alsa force-reload

It does nothing. I am not sure what else to try.

$ lsb_release -a 

No LSB modules are available. 

Distributor ID: Ubuntu 

Description: Ubuntu 18.04 LTS 

Release: 18.04 

Codename: bionic 



$ lsmod | grep snd_hda_intel

snd_hda_intel          40960  3

snd_hda_codec         126976  4 snd_hda_intel,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_codec_realtek

snd_hda_core           81920  5 snd_hda_intel,snd_hda_codec,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_codec_realtek

snd_pcm                98304  4 snd_hda_intel,snd_hda_codec,snd_hda_core,snd_hda_codec_hdmi

snd                    81920  18 snd_hda_intel,snd_hwdep,snd_seq,snd_hda_codec,snd_timer,snd_rawmidi,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_seq_device,snd_hda_codec_realtek,snd_pcm



$ lspci -nnk | grep -A2 Audio

00:1f.3 Audio device [0403]: Intel Corporation Sunrise Point-H HD Audio [8086:a170] (rev 31)

     Subsystem: Micro-Star International Co., Ltd. [MSI] Sunrise Point-H HD Audio [1462:fa15]

    Kernel driver in use: snd_hda_intel

    Kernel modules: snd_hda_intel



$ cat /etc/modprobe.d/alsa-base.conf

# autoloader aliases

install sound-slot-0 /sbin/modprobe snd-card-0

install sound-slot-1 /sbin/modprobe snd-card-1

install sound-slot-2 /sbin/modprobe snd-card-2

install sound-slot-3 /sbin/modprobe snd-card-3

install sound-slot-4 /sbin/modprobe snd-card-4

install sound-slot-5 /sbin/modprobe snd-card-5

install sound-slot-6 /sbin/modprobe snd-card-6

install sound-slot-7 /sbin/modprobe snd-card-7



# Cause optional modules to be loaded above generic modules

install snd /sbin/modprobe --ignore-install snd $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-ioctl32 ; /sbin/modprobe --quiet --use-blacklist snd-seq ; }

#

# Workaround at bug #499695 (reverted in Ubuntu see LP #319505)

install snd-pcm /sbin/modprobe --ignore-install snd-pcm $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-pcm-oss ; : ; }

install snd-mixer /sbin/modprobe --ignore-install snd-mixer $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-mixer-oss ; : ; }

install snd-seq /sbin/modprobe --ignore-install snd-seq $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-seq-midi ; /sbin/modprobe --quiet --use-blacklist snd-seq-oss ; : ; }

#

install snd-rawmidi /sbin/modprobe --ignore-install snd-rawmidi $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-seq-midi ; : ; }

# Cause optional modules to be loaded above sound card driver modules

install snd-emu10k1 /sbin/modprobe --ignore-install snd-emu10k1 $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-emu10k1-synth ; }

install snd-via82xx /sbin/modprobe --ignore-install snd-via82xx $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-seq ; }



# Load saa7134-alsa instead of saa7134 (which gets dragged in by it anyway)

install saa7134 /sbin/modprobe --ignore-install saa7134 $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist saa7134-alsa ; : ; }

# Prevent abnormal drivers from grabbing index 0

options bt87x index=-2

options cx88_alsa index=-2

options saa7134-alsa index=-2

options snd-atiixp-modem index=-2

options snd-intel8x0m index=-2

options snd-via82xx-modem index=-2

options snd-usb-audio index=-2

options snd-usb-caiaq index=-2

options snd-usb-ua101 index=-2

options snd-usb-us122l index=-2

options snd-usb-usx2y index=-2

# Ubuntu #62691, enable MPU for snd-cmipci

options snd-cmipci mpu_port=0x330 fm_port=0x388

# Keep snd-pcsp from being loaded as first soundcard

options snd-pcsp index=-2

# Keep snd-usb-audio from beeing loaded as first soundcard

options snd-usb-audio index=-2

options snd-hda-intel model=auto

I faced this as well when I dist-upgraded my custom-built desktop from 16.04.x to 18.04.1 (both LTS). After upgrading, sound didn't work. lspci listed the audio device but -- unlike yours -- the system stubbornly refused to load the relevant module. lshw showed the device as 'unclaimed'.

$ lspci -nnk | grep -A2 Audio

<snip>

00:1f.3 Audio device [0403]: Intel Corporation 200 Series PCH HD Audio [8086:a2f0]

        Subsystem: ASUSTeK Computer Inc. 200 Series PCH HD Audio [1043:8723]

<snip>



$ sudo lshw -c sound

     *-multimedia UNCLAIMED

          description: Audio device

          product: 200 Series PCH HD Audio

          vendor: Intel Corporation

I tried a bunch of Ask Ubuntu and web answers (such as these answers) but they didn't work for me. Eventually I tried the Sound Troubleshooting Procedure on help.ubuntu.com, and Step 3 of the troubleshooting procedures helped me get back sound. Essentially what I did is ran the following commands and rebooted.

sudo apt-add-repository ppa:ubuntu-audio-dev/alsa-daily

sudo apt-get update

sudo apt-get install linux-image-extra-`uname -r`

sudo apt-get install --reinstall linux-image-extra-`uname -r`  

sudo apt-get install oem-audio-hda-daily-dkms

Now lspci shows (and sound works):

$ lspci -nnk | grep -A2 Audio

00:1f.3 Audio device [0403]: Intel Corporation 200 Series PCH HD Audio [8086:a2f0]

    Subsystem: ASUSTeK Computer Inc. 200 Series PCH HD Audio [1043:8723]

    Kernel driver in use: snd_hda_intel

    Kernel modules: snd_hda_intel