Ask Ubuntu Asked by sancho.s ReinstateMonicaCellio on October 31, 2021
EDIT:
This appears to have turned in a sort of canonical set of commands to start diagnosing audio issues.
I am using Ubuntu 20.04 for over a month now.
After a reboot, I have no more sound and WiFi. Note that this is different from many other posts, which seem to have had no sound at all, after an upgrade. In this case, sound stopped working only after a reboot.
As for the sound, I seem to not have the appropriate kernel modules for sound, so I guess the most likely solution would come from making the modules available (it seems I have two sound cards).
I will try to include below (1) as much info as possible related to the copious posts with similar problems.
I am listing below (2) the posts that I consider most useful at the current point of the fixing work-in-progress.
And I am listing below (3) other posts that I checked when the grass was higher.
(1) Info about my broken system, along with a comparison with what I see in a working system that I managed to put together.
/proc/asound directory. $ cat /proc/asound/cards
0 [PCH ]: HDA-Intel - HDA Intel PCH
HDA Intel PCH at 0x604b108000 irq 159
1 [NVidia ]: HDA-Intel - HDA NVidia
HDA NVidia at 0xa4000000 irq 17
$ lsmod | grep snd outputs nothing. $ lsmod | grep snd_hda_intel
snd_hda_intel 53248 10
snd_intel_dspcfg 24576 3 snd_hda_intel,snd_sof_pci,snd_sof_intel_hda_common
snd_hda_codec 131072 5 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_realtek,snd_soc_hdac_hda
snd_hda_core 90112 9 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_ext_core,snd_hda_codec,snd_hda_codec_realtek,snd_sof_intel_hda_common,snd_soc_hdac_hda,snd_sof_intel_hda
snd_pcm 106496 9 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_sof,snd_sof_intel_hda_common,snd_soc_core,snd_hda_core,snd_pcm_dmaengine
snd 90112 33 snd_hda_codec_generic,snd_seq,snd_seq_device,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek,snd_timer,snd_compress,thinkpad_acpi,snd_soc_core,snd_pcm,snd_rawmidi
$ dpkg -L linux-modules-$(uname -r) | grep snd
/lib/modules/5.4.0-40-generic/kernel/sound/core/seq/snd-seq-dummy.ko
/lib/modules/5.4.0-40-generic/kernel/sound/core/seq/snd-seq-midi-emul.ko
/lib/modules/5.4.0-40-generic/kernel/sound/core/seq/snd-seq-midi-event.ko
/lib/modules/5.4.0-40-generic/kernel/sound/core/seq/snd-seq-midi.ko
/lib/modules/5.4.0-40-generic/kernel/sound/core/seq/snd-seq-virmidi.ko
/lib/modules/5.4.0-40-generic/kernel/sound/core/seq/snd-seq.ko
/lib/modules/5.4.0-40-generic/kernel/sound/core/snd-compress.ko
/lib/modules/5.4.0-40-generic/kernel/sound/core/snd-hrtimer.ko
/lib/modules/5.4.0-40-generic/kernel/sound/core/snd-hwdep.ko
/lib/modules/5.4.0-40-generic/kernel/sound/core/snd-pcm-dmaengine.ko
/lib/modules/5.4.0-40-generic/kernel/sound/core/snd-pcm.ko
/lib/modules/5.4.0-40-generic/kernel/sound/core/snd-rawmidi.ko
/lib/modules/5.4.0-40-generic/kernel/sound/core/snd-seq-device.ko
/lib/modules/5.4.0-40-generic/kernel/sound/core/snd-timer.ko
/lib/modules/5.4.0-40-generic/kernel/sound/core/snd.ko
/lib/modules/5.4.0-40-generic/kernel/sound/drivers/pcsp/snd-pcsp.ko
/lib/modules/5.4.0-40-generic/kernel/sound/pci/snd-ens1370.ko
Versus exactly the same
How can I check if any of this is what I need?
How can I check if any of this corresponds to those from Intel listed in item #2 above?
How can I load these modules?
inxi $ inxi -SA
System: Host: Hydrus1 Kernel: 5.4.0-40-generic x86_64 bits: 64 Desktop: Gnome 3.36.1 Distro: Ubuntu 20.04 LTS (Focal Fossa)
Audio: Device-1: Intel 6 Series/C200 Series Family High Definition Audio driver: N/A
Device-2: NVIDIA GF104 High Definition Audio driver: N/A
Versus (also compare with this)
$ inxi -SA
System: Host: ViaLactea Kernel: 5.4.0-40-generic x86_64 bits: 64 Console: tty 0 Distro: Ubuntu 20.04 LTS (Focal Fossa)
Audio: Device-1: Intel Cannon Lake PCH cAVS driver: snd_hda_intel
Device-2: NVIDIA GP107GL High Definition Audio driver: snd_hda_intel
Sound Server: ALSA v: k5.4.0-40-generic
lspci
$ lspci -nnk | grep -A 1 Audio
00:1b.0 Audio device [0403]: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller [8086:1c20] (rev 04)
DeviceName: Onboard Audio
Subsystem: Dell 6 Series/C200 Series Chipset Family High Definition Audio Controller [1028:04a4]
00:1c.0 PCI bridge [0604]: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 [8086:1c10] (rev b4)
--
01:00.1 Audio device [0403]: NVIDIA Corporation GF104 High Definition Audio Controller [10de:0beb] (rev a1)
Subsystem: Dell GF104 High Definition Audio Controller [1028:04a4]
03:00.0 Network controller [0280]: Intel Corporation Centrino Ultimate-N 6300 [8086:422b] (rev 35)
Versus
$ lspci -nnk | grep -n -A 4 Audio
49:00:1f.3 Audio device [0403]: Intel Corporation Cannon Lake PCH cAVS [8086:a348] (rev 10)
50- Subsystem: Lenovo Cannon Lake PCH cAVS [17aa:225f]
51- Kernel driver in use: snd_hda_intel
52- Kernel modules: snd_hda_intel, snd_sof_pci
53-00:1f.4 SMBus [0c05]: Intel Corporation Cannon Lake PCH SMBus Controller [8086:a323] (rev 10)
--
67:01:00.1 Audio device [0403]: NVIDIA Corporation GP107GL High Definition Audio Controller [10de:0fb9] (rev a1)
68- Kernel driver in use: snd_hda_intel
69- Kernel modules: snd_hda_intel
70-70:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader [10ec:525a] (rev 01)
71- Subsystem: Lenovo RTS525A PCI Express Card Reader [17aa:225f]
System (Versus exactly the same kernel)
$ uname -a
Linux Hydrus1 5.4.0-40-generic #44-Ubuntu SMP Tue Jun 23 00:01:04 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Test sound
$ aplay -l
aplay: device_list:274: no soundcards found...
Versus
$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC285 Analog [ALC285 Analog]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
...
lshw $ lshw -C multimedia
WARNING: you should run this program as super-user.
*-multimedia UNCLAIMED
description: Audio device
product: GF104 High Definition Audio Controller
vendor: NVIDIA Corporation
physical id: 0.1
bus info: pci@0000:01:00.1
version: a1
width: 32 bits
clock: 33MHz
capabilities: bus_master cap_list
configuration: latency=0
resources: memory:e0080000-e0083fff
*-multimedia UNCLAIMED
description: Audio device
product: 6 Series/C200 Series Chipset Family High Definition Audio Controller
vendor: Intel Corporation
physical id: 1b
bus info: pci@0000:00:1b.0
version: 04
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list
configuration: latency=0
resources: memory:e1e50000-e1e53fff
WARNING: output may be incomplete or inaccurate, you should run this program as super-user.
Here it is quoted (note the driver)
$ sudo lshw -C multimedia
*-multimedia
description: Audio device
product: GP104 High Definition Audio Controller
vendor: NVIDIA Corporation
physical id: 0.1
bus info: pci@0000:01:00.1
version: a1
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=snd_hda_intel latency=0
resources: irq:17 memory:f7080000-f7083fff
alsa packages
$ dpkg -l | grep alsa
ii alsa-base 1.0.25+dfsg-0ubuntu5 all ALSA driver configuration files
ii alsa-tools-gui 1.1.7-1ubuntu1 amd64 GUI based ALSA utilities for specific hardware
ii alsa-topology-conf 1.2.2-1 all ALSA topology configuration files
ii alsa-ucm-conf 1.2.2-1ubuntu0.1 all ALSA Use Case Manager configuration files
ii alsa-utils 1.2.2-1ubuntu1 amd64 Utilities for configuring and using ALSA
ii gstreamer1.0-alsa:amd64 1.16.2-4 amd64 GStreamer plugin for ALSA
ii libsox-fmt-alsa:amd64 14.4.2+git20190427-2 amd64 SoX alsa format I/O library
No sound either if I plug earphones.
I have no timidity-daemon to remove.
Attempt reload
$ sudo alsa force-reload
[sudo] password for user1:
Unloading ALSA sound driver modules: (none loaded).
Loading ALSA sound driver modules: (none to reload).
modprobe
$ grep intel /etc/modprobe.d/alsa-base.conf
options snd-intel8x0m index=-2
(2) Related and possibly useful posts
Unable to get sound working. Ubuntu Server 14.04.3
https://forums.linuxmint.com/viewtopic.php?t=221745
https://ubuntuforums.org/showthread.php?t=1684576
How to load "snd-hda-intel" at startup
(3) Other related posts
https://www.alsa-project.org/wiki/Matrix:Module-hda-intel
https://askubuntu.com/a/1244118/226614 . Recent post, accepted answer. Suggests using a ppa for fixing. I am not sure this can get things worse…
https://askubuntu.com/a/1249071/226614 . Recent post. Suggests using
sudo setfacl -m u:user1:rw /dev/snd/*
Tried this, didn’t help.
https://askubuntu.com/a/847954/226614 . Old post, accepted answer. Suggests installing alsa-firmware-loaders and alsa-base. I am not sure this still applies…
How to install missing firmware for an Creative Labs Audigy2 soundcard? . Also old post. Also suggests UNCLAIMED device is due to firmware issues.
Why would the problem appear after a reboot?
No sound on upgrade (18.04 -> 20.04) only have "dummy output"
Dummy output after standby since upgrading to Ubuntu 20.04
Internal speaker (Audio) is not working in Ubuntu 20.04 LTS after upgrading from Ubuntu 18.04 LTS
Soundcard not detected by pulseaudio (but by alsa)
How to install missing firmware for an Creative Labs Audigy2 soundcard?
I had the same issue, there was only "Dummy output" in the list of sound devices.
I checked
$ modprobe --show-depends snd_hda_intel
and received further output:
modprobe: FATAL: Module snd_hda_intel not found in directory /lib/modules/5.11.0-22-generic
I started to check if the files are present (according to the correct answer above). The files were present for the previous kernels - 5.4.x-xx and 5.8.x-xx.
I finally found that there are problems with the kernel 5.11 with sound devices.
Then I simply rebooted under the 5.8.
If anyone knows how to solve the problem for the 5.11 kernel, please let me know. The advices above didn't help.
Answered by Aidos on October 31, 2021
I tried Aiden Turner's solution, because it seemed like the least potentially harmful. When I did the force-reload I heard the speakers pop, my sound device showed up in the control panel, and I had working sound after raising the volume control above the default mute level.
Rebooting the system returned me to the dummy sound problem, so I disabled the timidity service per YuanW's post above. My sound card was immediately visible, and this time it survived a reboot.
So the combination of those two solutions worked for me. Reinstall pulseaudio and alsa-base, reinitialize, and then disable timidity. It's possible that only the second step is actually necessary, but I couldn't undo it and it's mostly harmless so I'm going with the whole process.
Answered by mobilityguy on October 31, 2021
Please try this
$ sudo apt-get install --reinstall alsa-base pulseaudio
$ sudo alsa force-reload
Answered by Aiden Turner on October 31, 2021
Had the same issue, I just did:
sudo killall timidity
Then the sound came back.
But after reboot, there is no sound again.
Then I figured out the proper way of disabling timidity:
sudo systemctl stop timidity.service
sudo systemctl disable timidity.service
Answered by YuanW. on October 31, 2021
give it try, it worked for me
sudo apt purge timidity-daemon
source: No sound on upgrade (18.04 -> 20.04) only have "dummy output"
Answered by Abdan Syakuro on October 31, 2021
Try to check if all dependencies are correct:
modprobe --show-depends snd_hda_intel
And check if the kernel module exists:
find /lib/modules/$(uname -r)/kernel/sound -name snd-hda-intel.ko
BTW the right forum for alsa/sound problems would be alsa forum (alsa-project.org/wiki/Main_Page).
BTW: There exists a beautiful script that uploads all necessary info for debugging sound problems --> wiki.ubuntu.com/Audio/AlsaInfo; you can also install it with sudo apt install alsa-utils.
Run the script alsa-info, which will help you to print all necessary info for future problems with a minimum of effort.
As the kernel itself is missing you have to install it e.g. via this package:
sudo apt install linux-modules-extra-$(uname -r)
Answered by abu_bua on October 31, 2021
EDIT: Avoid missing kernel linux-modules-extra-XX-generic when updating kernel may help avoiding the problem in the future, in some cases. (I actually ran into this same problem later again after a new automatic update, and then identified the missing package).
Summary: I managed to
After trying many things, I have solved the problem. It was essential to have, in addition to my broken system S1, a similar working system S2 available. I was very lucky to have this, and I guess it might have taken me tons of extra time otherwise.
Detailing the list of steps above:
In S1:
$ modprobe --show-depends snd_hda_intel
modprobe: FATAL: Module snd_hda_intel not found in directory /lib/modules/5.4.0-40-generic
In S2:
$ modprobe --show-depends snd_hda_intel
insmod /lib/modules/5.4.0-40-generic/kernel/sound/soundcore.ko
install /sbin/modprobe --ignore-install snd $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-ioctl32 ; /sbin/modprobe --quiet --use-blacklist snd-seq ; }
insmod /lib/modules/5.4.0-40-generic/kernel/sound/core/snd-timer.ko
install /sbin/modprobe --ignore-install snd-pcm $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-pcm-oss ; : ; }
insmod /lib/modules/5.4.0-40-generic/kernel/sound/core/snd-hwdep.ko
insmod /lib/modules/5.4.0-40-generic/kernel/sound/hda/snd-hda-core.ko
insmod /lib/modules/5.4.0-40-generic/kernel/sound/pci/hda/snd-hda-codec.ko
insmod /lib/modules/5.4.0-40-generic/kernel/sound/hda/snd-intel-dspcfg.ko
insmod /lib/modules/5.4.0-40-generic/kernel/sound/pci/hda/snd-hda-intel.ko
I had the first three .ko files in my S1, but not the last four.
So I checked the owner package in S2 for the last four files.
$ dpkg -S /lib/modules/5.4.0-40-generic/kernel/sound/hda/snd-hda-core.ko
linux-modules-extra-5.4.0-40-generic: /lib/modules/5.4.0-40-generic/kernel/sound/hda/snd-hda-core.ko
which was the same for the other three files missing in S1. I checked and this package was not installed in S1.
I apt-get'd the package, rebooted, and now everything seems to be back to normal.
My guess is that the package was present during the time sound worked, and for some strange reason it got uninstalled (or removed, or...) from the dkpg database, or...?
Notes:
I had also kernel 5.4.0-39 in S1, and sound didn't work in this kernel either, prior to the fixing which worked.
It turned out that linux-modules-extra-5.4.0-39-generic was not installed either.
On (Compiled) Kernel Drivers vs. (Loadable) Kernel Drivers / Modules: see this.
Answered by sancho.s ReinstateMonicaCellio on October 31, 2021
I ran into this sound problem with Ubuntu 20.04 after a recent hardware upgrade.
Making the following change sorted it out, perhaps it will for you as well.
Append the line
options snd-hda-intel model=auto
at the end of file /etc/modprob.d/alsa-base.conf.
Answered by Mark on October 31, 2021
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