Ubuntu 20.04 - No sound

Question

I installed Ubuntu 20.04 LTS and I noticed that I have no sound, I am using Lenovo Legion Y520-15IKBN. I want to continue using Ubuntu and learning about Linux, but having no sound is a kind of a deal breaker for me and going back to Windows is my last resort.

I have tried every Google result, and every “solution” but nothing is working. I also apologize if a thread like this already exists, but I was really digging around ask Ubuntu and I couldn’t find any solutions.

Thank you for your help, and sorry for my English 🙂

First I want to say that when I plug in my USB headphones, audio is working just fine, the problem is with laptop’s built in speakers and microphone.

Here is what I know:

sudo lspci outputs:

00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 05)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor PCIe Controller (x16) (rev 05)
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 630 (rev 04)
00:14.0 USB controller: Intel Corporation 100 Series/C230 Series Chipset Family USB 3.0 xHCI Controller (rev 31)
00:14.2 Signal processing controller: Intel Corporation 100 Series/C230 Series Chipset Family Thermal Subsystem (rev 31)
00:16.0 Communication controller: Intel Corporation 100 Series/C230 Series Chipset Family MEI Controller #1 (rev 31)
00:17.0 SATA controller: Intel Corporation HM170/QM170 Chipset SATA Controller [AHCI Mode] (rev 31)
00:1c.0 PCI bridge: Intel Corporation 100 Series/C230 Series Chipset Family PCI Express Root Port #2 (rev f1)
00:1c.2 PCI bridge: Intel Corporation 100 Series/C230 Series Chipset Family PCI Express Root Port #3 (rev f1)
00:1c.3 PCI bridge: Intel Corporation 100 Series/C230 Series Chipset Family PCI Express Root Port #4 (rev f1)
00:1d.0 PCI bridge: Intel Corporation 100 Series/C230 Series Chipset Family PCI Express Root Port #9 (rev f1)
00:1f.0 ISA bridge: Intel Corporation HM175 Chipset LPC/eSPI Controller (rev 31)
00:1f.2 Memory controller: Intel Corporation 100 Series/C230 Series Chipset Family Power Management Controller (rev 31)
00:1f.3 Audio device: Intel Corporation CM238 HD Audio Controller (rev 31)
00:1f.4 SMBus: Intel Corporation 100 Series/C230 Series Chipset Family SMBus (rev 31)
01:00.0 3D controller: NVIDIA Corporation GP107M [GeForce GTX 1050 Mobile] (rev a1)
02:00.0 SD Host controller: O2 Micro, Inc. SD/MMC Card Reader Controller (rev 01)
03:00.0 Network controller: Intel Corporation Wireless 8265 / 8275 (rev 78)
04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 10)
05:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller SM961/PM961

sudo lspci -v outputs:

00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 05)
    Subsystem: Lenovo Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers
    Flags: bus master, fast devsel, latency 0
    Capabilities: [e0] Vendor Specific Information: Len=10 <?>
    Kernel driver in use: skl_uncore

00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor PCIe Controller (x16) (rev 05) (prog-if 00 [Normal decode])
    Flags: bus master, fast devsel, latency 0, IRQ 122
    Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
    I/O behind bridge: 00004000-00004fff [size=4K]
    Memory behind bridge: a3000000-a3ffffff [size=16M]
    Prefetchable memory behind bridge: 0000000090000000-00000000a1ffffff [size=288M]
    Capabilities: [88] Subsystem: Lenovo Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor PCIe Controller (x16)
    Capabilities: [80] Power Management version 3
    Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
    Capabilities: [a0] Express Root Port (Slot+), MSI 00
    Capabilities: [100] Virtual Channel
    Capabilities: [140] Root Complex Link
    Capabilities: [d94] Secondary PCI Express
    Kernel driver in use: pcieport

00:02.0 VGA compatible controller: Intel Corporation HD Graphics 630 (rev 04) (prog-if 00 [VGA controller])
    Subsystem: Lenovo HD Graphics 630
    Flags: bus master, fast devsel, latency 0, IRQ 138
    Memory at a2000000 (64-bit, non-prefetchable) [size=16M]
    Memory at b0000000 (64-bit, prefetchable) [size=256M]
    I/O ports at 5000 [size=64]
    Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
    Capabilities: [40] Vendor Specific Information: Len=0c <?>
    Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
    Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable- 64bit-
    Capabilities: [d0] Power Management version 2
    Capabilities: [100] Process Address Space ID (PASID)
    Capabilities: [200] Address Translation Service (ATS)
    Capabilities: [300] Page Request Interface (PRI)
    Kernel driver in use: i915
    Kernel modules: i915

00:14.0 USB controller: Intel Corporation 100 Series/C230 Series Chipset Family USB 3.0 xHCI Controller (rev 31) (prog-if 30 [XHCI])
    Subsystem: Lenovo 100 Series/C230 Series Chipset Family USB 3.0 xHCI Controller
    Flags: bus master, medium devsel, latency 0, IRQ 127
    Memory at a4410000 (64-bit, non-prefetchable) [size=64K]
    Capabilities: [70] Power Management version 2
    Capabilities: [80] MSI: Enable+ Count=1/8 Maskable- 64bit+
    Kernel driver in use: xhci_hcd

00:14.2 Signal processing controller: Intel Corporation 100 Series/C230 Series Chipset Family Thermal Subsystem (rev 31)
    Subsystem: Lenovo 100 Series/C230 Series Chipset Family Thermal Subsystem
    Flags: bus master, fast devsel, latency 0, IRQ 18
    Memory at a442a000 (64-bit, non-prefetchable) [size=4K]
    Capabilities: [50] Power Management version 3
    Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit-
    Kernel driver in use: intel_pch_thermal
    Kernel modules: intel_pch_thermal

00:16.0 Communication controller: Intel Corporation 100 Series/C230 Series Chipset Family MEI Controller #1 (rev 31)
    Subsystem: Lenovo 100 Series/C230 Series Chipset Family MEI Controller
    Flags: bus master, fast devsel, latency 0, IRQ 136
    Memory at a442b000 (64-bit, non-prefetchable) [size=4K]
    Capabilities: [50] Power Management version 3
    Capabilities: [8c] MSI: Enable+ Count=1/1 Maskable- 64bit+
    Kernel driver in use: mei_me
    Kernel modules: mei_me

00:17.0 SATA controller: Intel Corporation HM170/QM170 Chipset SATA Controller [AHCI Mode] (rev 31) (prog-if 01 [AHCI 1.0])
    Subsystem: Lenovo HM170/QM170 Chipset SATA Controller [AHCI Mode]
    Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 128
    Memory at a4428000 (32-bit, non-prefetchable) [size=8K]
    Memory at a442e000 (32-bit, non-prefetchable) [size=256]
    I/O ports at 5080 [size=8]
    I/O ports at 5088 [size=4]
    I/O ports at 5060 [size=32]
    Memory at a442c000 (32-bit, non-prefetchable) [size=2K]
    Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
    Capabilities: [70] Power Management version 3
    Capabilities: [a8] SATA HBA v1.0
    Kernel driver in use: ahci
    Kernel modules: ahci

00:1c.0 PCI bridge: Intel Corporation 100 Series/C230 Series Chipset Family PCI Express Root Port #2 (rev f1) (prog-if 00 [Normal decode])
    Flags: bus master, fast devsel, latency 0, IRQ 123
    Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
    I/O behind bridge: [disabled]
    Memory behind bridge: a4300000-a43fffff [size=1M]
    Prefetchable memory behind bridge: [disabled]
    Capabilities: [40] Express Root Port (Slot+), MSI 00
    Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
    Capabilities: [90] Subsystem: Lenovo 100 Series/C230 Series Chipset Family PCI Express Root Port
    Capabilities: [a0] Power Management version 3
    Capabilities: [100] Advanced Error Reporting
    Capabilities: [140] Access Control Services
    Capabilities: [200] L1 PM Substates
    Capabilities: [220] Secondary PCI Express
    Kernel driver in use: pcieport

00:1c.2 PCI bridge: Intel Corporation 100 Series/C230 Series Chipset Family PCI Express Root Port #3 (rev f1) (prog-if 00 [Normal decode])
    Flags: bus master, fast devsel, latency 0, IRQ 124
    Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
    I/O behind bridge: [disabled]
    Memory behind bridge: a4200000-a42fffff [size=1M]
    Prefetchable memory behind bridge: [disabled]
    Capabilities: [40] Express Root Port (Slot+), MSI 00
    Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
    Capabilities: [90] Subsystem: Lenovo 100 Series/C230 Series Chipset Family PCI Express Root Port
    Capabilities: [a0] Power Management version 3
    Capabilities: [100] Null
    Capabilities: [140] Access Control Services
    Capabilities: [200] L1 PM Substates
    Capabilities: [220] Secondary PCI Express
    Kernel driver in use: pcieport

00:1c.3 PCI bridge: Intel Corporation 100 Series/C230 Series Chipset Family PCI Express Root Port #4 (rev f1) (prog-if 00 [Normal decode])
    Flags: bus master, fast devsel, latency 0, IRQ 125
    Bus: primary=00, secondary=04, subordinate=04, sec-latency=0
    I/O behind bridge: 00003000-00003fff [size=4K]
    Memory behind bridge: a4100000-a41fffff [size=1M]
    Prefetchable memory behind bridge: [disabled]
    Capabilities: [40] Express Root Port (Slot+), MSI 00
    Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
    Capabilities: [90] Subsystem: Lenovo 100 Series/C230 Series Chipset Family PCI Express Root Port
    Capabilities: [a0] Power Management version 3
    Capabilities: [100] Null
    Capabilities: [140] Access Control Services
    Capabilities: [220] Secondary PCI Express
    Kernel driver in use: pcieport

00:1d.0 PCI bridge: Intel Corporation 100 Series/C230 Series Chipset Family PCI Express Root Port #9 (rev f1) (prog-if 00 [Normal decode])
    Flags: bus master, fast devsel, latency 0, IRQ 126
    Bus: primary=00, secondary=05, subordinate=05, sec-latency=0
    I/O behind bridge: [disabled]
    Memory behind bridge: a4000000-a40fffff [size=1M]
    Prefetchable memory behind bridge: [disabled]
    Capabilities: [40] Express Root Port (Slot+), MSI 00
    Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
    Capabilities: [90] Subsystem: Lenovo 100 Series/C230 Series Chipset Family PCI Express Root Port
    Capabilities: [a0] Power Management version 3
    Capabilities: [100] Advanced Error Reporting
    Capabilities: [140] Access Control Services
    Capabilities: [200] L1 PM Substates
    Capabilities: [220] Secondary PCI Express
    Kernel driver in use: pcieport

00:1f.0 ISA bridge: Intel Corporation HM175 Chipset LPC/eSPI Controller (rev 31)
    Subsystem: Lenovo HM175 Chipset LPC/eSPI Controller
    Flags: bus master, medium devsel, latency 0

00:1f.2 Memory controller: Intel Corporation 100 Series/C230 Series Chipset Family Power Management Controller (rev 31)
    Subsystem: Lenovo 100 Series/C230 Series Chipset Family Power Management Controller
    Flags: bus master, fast devsel, latency 0
    Memory at a4424000 (32-bit, non-prefetchable) [size=16K]

00:1f.3 Audio device: Intel Corporation CM238 HD Audio Controller (rev 31)
    Subsystem: Lenovo CM238 HD Audio Controller
    Flags: bus master, fast devsel, latency 32, IRQ 16
    Memory at a4420000 (64-bit, non-prefetchable) [size=16K]
    Memory at a4400000 (64-bit, non-prefetchable) [size=64K]
    Capabilities: [50] Power Management version 3
    Capabilities: [60] MSI: Enable- Count=1/1 Maskable- 64bit+
    Kernel driver in use: snd_hda_intel
    Kernel modules: snd_hda_intel

00:1f.4 SMBus: Intel Corporation 100 Series/C230 Series Chipset Family SMBus (rev 31)
    Subsystem: Lenovo 100 Series/C230 Series Chipset Family SMBus
    Flags: medium devsel, IRQ 16
    Memory at a442d000 (64-bit, non-prefetchable) [size=256]
    I/O ports at 5040 [size=32]
    Kernel driver in use: i801_smbus
    Kernel modules: i2c_i801

01:00.0 3D controller: NVIDIA Corporation GP107M [GeForce GTX 1050 Mobile] (rev a1)
    Subsystem: Lenovo GP107M [GeForce GTX 1050 Mobile]
    Flags: bus master, fast devsel, latency 0, IRQ 16
    Memory at a3000000 (32-bit, non-prefetchable) [size=16M]
    Memory at 90000000 (64-bit, prefetchable) [size=256M]
    Memory at a0000000 (64-bit, prefetchable) [size=32M]
    I/O ports at 4000 [size=128]
    Capabilities: [60] Power Management version 3
    Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+
    Capabilities: [78] Express Endpoint, MSI 00
    Capabilities: [100] Virtual Channel
    Capabilities: [250] Latency Tolerance Reporting
    Capabilities: [258] L1 PM Substates
    Capabilities: [128] Power Budgeting <?>
    Capabilities: [420] Advanced Error Reporting
    Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1 Len=024 <?>
    Capabilities: [900] Secondary PCI Express
    Kernel driver in use: nvidia
    Kernel modules: nvidiafb, nouveau, nvidia_drm, nvidia

02:00.0 SD Host controller: O2 Micro, Inc. SD/MMC Card Reader Controller (rev 01) (prog-if 01)
    Subsystem: Lenovo SD/MMC Card Reader Controller
    Flags: bus master, fast devsel, latency 0, IRQ 129
    Memory at a4301000 (32-bit, non-prefetchable) [size=4K]
    Memory at a4300000 (32-bit, non-prefetchable) [size=2K]
    Capabilities: [6c] Power Management version 3
    Capabilities: [48] MSI: Enable+ Count=1/1 Maskable+ 64bit+
    Capabilities: [80] Express Endpoint, MSI 00
    Capabilities: [100] Virtual Channel
    Capabilities: [200] Advanced Error Reporting
    Capabilities: [230] Latency Tolerance Reporting
    Capabilities: [240] L1 PM Substates
    Kernel driver in use: sdhci-pci
    Kernel modules: sdhci_pci

03:00.0 Network controller: Intel Corporation Wireless 8265 / 8275 (rev 78)
    Subsystem: Intel Corporation Dual Band Wireless-AC 8265
    Flags: bus master, fast devsel, latency 0, IRQ 137
    Memory at a4200000 (64-bit, non-prefetchable) [size=8K]
    Capabilities: [c8] Power Management version 3
    Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
    Capabilities: [40] Express Endpoint, MSI 00
    Capabilities: [100] Advanced Error Reporting
    Capabilities: [140] Device Serial Number 00-28-f8-ff-ff-c0-f7-83
    Capabilities: [14c] Latency Tolerance Reporting
    Capabilities: [154] L1 PM Substates
    Kernel driver in use: iwlwifi
    Kernel modules: iwlwifi

04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 10)
    Subsystem: Lenovo RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
    Flags: bus master, fast devsel, latency 0, IRQ 19
    I/O ports at 3000 [size=256]
    Memory at a4104000 (64-bit, non-prefetchable) [size=4K]
    Memory at a4100000 (64-bit, non-prefetchable) [size=16K]
    Capabilities: [40] Power Management version 3
    Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
    Capabilities: [70] Express Endpoint, MSI 01
    Capabilities: [b0] MSI-X: Enable+ Count=4 Masked-
    Capabilities: [d0] Vital Product Data
    Capabilities: [100] Advanced Error Reporting
    Capabilities: [140] Virtual Channel
    Capabilities: [160] Device Serial Number 00-00-00-00-00-00-00-00
    Capabilities: [170] Latency Tolerance Reporting
    Capabilities: [178] L1 PM Substates
    Kernel driver in use: r8169
    Kernel modules: r8169

05:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller SM961/PM961 (prog-if 02 [NVM Express])
    Subsystem: Samsung Electronics Co Ltd NVMe SSD Controller SM961/PM961
    Flags: bus master, fast devsel, latency 0, IRQ 16, NUMA node 0
    Memory at a4000000 (64-bit, non-prefetchable) [size=16K]
    Capabilities: [40] Power Management version 3
    Capabilities: [50] MSI: Enable- Count=1/32 Maskable- 64bit+
    Capabilities: [70] Express Endpoint, MSI 00
    Capabilities: [b0] MSI-X: Enable+ Count=33 Masked-
    Capabilities: [100] Advanced Error Reporting
    Capabilities: [148] Device Serial Number 00-00-00-00-00-00-00-00
    Capabilities: [158] Power Budgeting <?>
    Capabilities: [168] Secondary PCI Express
    Capabilities: [188] Latency Tolerance Reporting
    Capabilities: [190] L1 PM Substates
    Kernel driver in use: nvme
    Kernel modules: nvme

I tried to purge pulse, alsa, reinstall them, but nothing seems to help.

When I type alsamixer, I get this:

cannot open mixer: No such file or directory

Here is the link of alsa-info script that I run on my laptop.

dmsg output is this:

snd_hda_intel 0000:00:1f.3: azx_get_response timeout, switching to polling mode: last cmd=0x200f0000
[    7.699475] snd_hda_intel 0000:00:1f.3: No response from codec, disabling MSI: last cmd=0x200f0000
[    8.703470] snd_hda_intel 0000:00:1f.3: Codec #2 probe error; disabling it...
[    8.708107] hdaudio hdaudioC0D0: cannot read sub nodes for FG 0x10
[    8.708111] snd_hda_intel 0000:00:1f.3: no codecs initialized

sudo lshw -C multimedia:

*-usb:0                   
       description: Video
       product: EasyCamera
       vendor: Chicony Electronics Co.,Ltd.
       physical id: 6
       bus info: usb@1:6
       version: 87.40
       serial: 0001
       capabilities: usb-2.00
       configuration: driver=uvcvideo maxpower=500mA speed=480Mbit/s
  *-multimedia
       description: Audio device
       product: CM238 HD Audio Controller
       vendor: Intel Corporation
       physical id: 1f.3
       bus info: pci@0000:00:1f.3
       version: 31
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi bus_master cap_list
       configuration: driver=snd_hda_intel latency=32
       resources: irq:16 memory:a4420000-a4423fff memory:a4400000-a440ffff

uname-a:

Linux tomo-laptop 5.4.0-29-generic #33-Ubuntu SMP Wed Apr 29 14:32:27 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

20.04 alsa drivers sound

1mi · Answer

For me only worked to downgrade the kernel to 5.4.0-39 then reinstall pulseaudio and alsa-base as mentioned in a previous answer:
sudo apt install linux-image-5.4.0-39-generic linux-headers-5.4.0-39-generic linux-modules-5.4.0-39-generic linux-modules-extra-5.4.0-39-generic 
sudo apt-get install --reinstall alsa-base pulseaudio
sudo alsa force-reload

Somewhere I read that the timidity-daemon can cause this too and it was the case for me, so I removed it:
sudo apt purge timidity-daemon

Then rebooted using the above kernel.
Note also that changing the alsa-base.conf and blacklist.conf files in /etc/modprobe.d/ did not fix the issue for me. The "Dummy output" device changed to a real sound device but the sound still did not work. Therefore I commented the added lines at the end of these fies.

Ian Quinn · Answer

From the Applications Menu choose Startup Applications; in the Name box write " Volume Control " : In the Command box type " pulseaudio --start " (that is pulseaudio, space,hyphen,hyphen start (ignore red underline)) and in Content box put something like Turn Sound on. Why that is not the default position I do not know.

Answered by Ian Quinn on December 25, 2021

Tasnuva · Answer

I have faced the similar problem, followed many instructions but just a silly BIOS tweak did the charm:
go to BIOS -> disable Internal Speakers -> apply changes -> Enable again -> Apply changes -> Exit.

dell 3410

Leon Arundell · Answer

The following method worked for me:

Open a terminal (++T)
Enter the command: sudo gedit /etc/modprobe.d/alsa-base.conf
Add the following line at the end of alsa-base.conf: options snd-hda-intel dmic_detect=0
Save alsa-base.conf
Re-boot

WKPro · Answer

Unfortunately after many tries and tutorials I wasn't able to fix my sound problem. I bought BT speakers and I'm using them instead of my laptop speakers but I will not give up on trying to fix this. thank you all for your help :)

Answered by WKPro on December 25, 2021

F.X. · Answer

I had a similar issue with @user13595. I recently upgraded from Ubuntu 18.04 to 20.04 and the sound problem persisted (both before and after). I have tried almost every possible solutions (reinstall alsa and pulseaudio, temporary fix for the kernel regression, etc) and none of them worked for me.
What I had to do was:
sudo gedit /etc/modprobe.d/alsa-base.conf

and add
options snd-hda-intel model=generic

to the end of the file.
Then reboot my machine.
Note:
Without tweaking this line, I only have Dummy output. After this tweak, I can see my NVIDIA HDMI output. If I want to make on-board Intel sound available, I have to plug in my speaker first and then boot the machine. Only then can I see both outputs (HDMI and onboard Intel one). What is more, the onboard Intel output will disappear, if I were to unplug my speaker and replug it, while my machine is running. In that case, I will have to keep the speaker plugged and reboot to make it work. Or I will have to avoid unplugging my speaker when my machine is on.
Source

If you continue to get no sound output and still only see the Dummy Output in System Settings, you can try to set the model to auto instead of generic, so edit the /etc/modprobe.d/alsa-base.conf file with a text editor (as root) and change that. -- click here

Hope this help someone.

user13595 · Answer

I had a very similar problem: Upgraded from Ubuntu 18.04 to 20.04, and sound disappeared. pavucontrol only showed HDMI sound under outputs, not my on-board Intel HDA sound.
I first tried the edits Elder Geek suggested above. They made no difference, so I reverted the changes by putting #'s in front of them.
Then I tried purging and reinstalling alsa-base and pulseaudio. It made no difference.
Then I ran alsamixer in a terminal, and lo and behold, my on-board sound showed up! By pressing F6 I could select it as output.
It still didn't show up in pavucontrol, so I ran sudo alsa force-reload, and now everything worked. pavucontrol even automatically selected my on-board sound.
I got the tips from this page: https://www.maketecheasier.com/fix-no-sound-issue-ubuntu/

Khalil · Answer

I had the same problem. After installing Ubuntu 20.04 alongside my windows, I realized it has no sound. Reinstalling alsa-base and pulseaudio resolved it...

sudo apt-get install --reinstall alsa-base pulseaudio
sudo alsa force-reload

Source

Elder Geek · Answer

If you have the "sound card not detected (dummy output)" problem:
There's a regression in the 5.3.0-41 and -42 kernel that causes a new "dummy output" issue on Ubuntu 18.04 - 20.04 as explained in this bug report.

You can check your kernel version by issuing the command uname -a

In order to resolve this problem with the aforementioned kernels we need to do a few simple things.

Sources:

https://bugs.launchpad.net/ubuntu/+source/linux-oem-osp1/+bug/1864061

https://www.linuxuprising.com/2018/06/fix-no-sound-dummy-output-issue-in.html
1) Edit /etc/modprobe.d/alsa-base.conf as root and add options snd-hda-intel dmic_detect=0 at the end of this file.

If you don't want to edit it manually you can achieve the same result by issuing the following command (ONCE only) echo "options snd-hda-intel dmic_detect=0" | sudo tee -a /etc/modprobe.d/alsa-base.conf

2)  Edit /etc/modprobe.d/blacklist.conf as root and add blacklist snd_soc_skl at the end of the file.

If you don't want to edit it manually you can achieve the same result by issuing the following command (ONCE only) echo "blacklist snd_soc_skl" | sudo tee -a /etc/modprobe.d/blacklist.conf

3) Reboot your system to make these changes take effect

Note: The developers are working on fixing this problem. It may be necessary to revert these changes by removing the added lines in the aforementioned files after a kernel update beyond the kernel versions mentioned.

Elder Geek · Answer

If you are running under virtualbox: I freshly loaded 20.04 into a VM under virtualbox. To my surprise I found that the volume defaulted to mute (0%). I resolved this with the simple process of opening settings -> sound and boosting the volume at "Volume Levels" (System Sounds) (Default setting shown below)

Chad WALSTROM · Answer

I've had luck with pavucontrol. For some reason, the output selector from the Settings->Sound dialog box didn't work for me, but with pavucontrol, I was able to select the correct output.

$ sudo apt install pavucontrol
$ pavucontrol &

Port: Headphones (unplugged) works however system recognizes it as unplugged.

Ubuntu 20.04 - No sound

11 Answers

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Source

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