[Solved] No sound and "Dummy Output" after upgrading to kernel 5.3.0-42 on Lenovo Ideapad S740

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SRS84
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[Solved] No sound and "Dummy Output" after upgrading to kernel 5.3.0-42 on Lenovo Ideapad S740

Post by SRS84 »

I got this Lenovo Ideapad S740 laptop around the first of the year and immediately installed Mint. I was never able to get the built in speakers to work, but the microphone worked and I had sound through headphones.

Today I upgraded to kernel 5.3.0-42 through the Update Manager, and after rebooting I have no sound whatsoever. The only audio output device that shows up in the volume control app that is accessible from the system tray is "Dummy Output", and there are no input devices available. Plugging in headphones has no effect on this.

Here is some relevant output from lspci:
lspci -nnk | grep audio
00:1f.3 Multimedia audio controller [0401]: Intel Corporation Cannon Lake PCH cAVS [8086:a348] (rev 10)
Last edited by SRS84 on Thu Apr 02, 2020 10:45 am, edited 1 time in total.

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Re: No sound and "Dummy Output" after upgrading to kernel 5.3.0-42 on Lenovo Ideapad S740

Post by Flemur »

SRS84 wrote:
Mon Mar 16, 2020 12:23 pm
Today I upgraded to kernel 5.3.0-42 through the Update Manager, and after rebooting I have no sound whatsoever. The only audio output device that shows up in the volume control app that is accessible from the system tray is "Dummy Output", and there are no input devices available. Plugging in headphones has no effect on this.
Do these commands show any hardware?

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aplay -l 
aplay -L 
inxi -A
FWIW, I went back to 4.15 kernel after trying 5.3, which would cause the system to hang (no CPU use?) for about 10 seconds every once in a while; other people seem to have more "issues" with 5.3. FWIW.

Edit: You might try these

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rm -r ~/.config/pulse && pulseaudio -k
dpkg-reconfigure  alsa-utils 
dpkg-reconfigure  pulseaudio
Edit2: use your favorite search engine on

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linux audio Lenovo Ideapad "S740"
and you'll see your're not alone.
Please edit your original post title to include [SOLVED] if/when it is solved!
Your data and OS are backed up....right?

SRS84
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Re: No sound and "Dummy Output" after upgrading to kernel 5.3.0-42 on Lenovo Ideapad S740

Post by SRS84 »

The system hung on the next shutdown after reading your reply, and I had to force shutdown, so I decided to revert to the 5.3.0-40 kernel until the bugs are worked out of the newer version. At least I have sound through headphones this way.

I did some searching when I first installed Linux on this machine and I think I saw that others were having similar issues. It is not optimal but I am okay with having sound only through headphones. However, I hope that eventually someone will find a fix for the issue.

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Re: No sound and "Dummy Output" after upgrading to kernel 5.3.0-42 on Lenovo Ideapad S740

Post by MrEen »

SRS84 wrote:
Mon Mar 16, 2020 1:20 pm
The system hung on the next shutdown after reading your reply, and I had to force shutdown, so I decided to revert to the 5.3.0-40 kernel until the bugs are worked out of the newer version. At least I have sound through headphones this way.

I did some searching when I first installed Linux on this machine and I think I saw that others were having similar issues. It is not optimal but I am okay with having sound only through headphones. However, I hope that eventually someone will find a fix for the issue.
Hi SRS84.

It's possible your sound card needs a quirk to get it working properly. It's also possible it just needs a change in the configuration, such as the speakers might be muted.

If you'd like to tackle it, paste back the outputs of these commands: inxi -Fxz, aplay -l, pacmd list-cards and dmesg | grep snd

When pasting large blocks of text, please enclose the results in-between [ⅽode] and [/ⅽode] code markers by selecting </> from the mini toolbar above the textbox where you type your reply.

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Re: No sound and "Dummy Output" after upgrading to kernel 5.3.0-42 on Lenovo Ideapad S740

Post by D5B7 »

I have the same problem after upgrading my ASUS TUF 765I7 to Linux Mint kernel version 5.3.0-42-generic.

No sound card detected.
No sound anywhere ( all softwares, Banshee, pavucontrol, sound system, etc ).
I've tried all ALSA manipulation: remove, re-install, etc. No results.

Everything was fine, kernel version 5.3.0-40-generic.

I had to Timeshift to that version to get my sound ok.

I guess i'll wait until next kernel upgrade...

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Re: No sound and "Dummy Output" after upgrading to kernel 5.3.0-42 on Lenovo Ideapad S740

Post by SRS84 »

I don't think you have to use Timeshift to revert to an older kernel.

You can just choose the older kernel from the Grub menu at boot, then once you have booted you can remove the old kernel using Update Manager.

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Re: No sound and "Dummy Output" after upgrading to kernel 5.3.0-42 on Lenovo Ideapad S740

Post by SRS84 »

Thanks for your interest in my post. Here are the outputs from the commands listed by MrEen:

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username@SRS-Lenovo-laptop:~$ inxi -Fxz
System:
  Host: SRS-Lenovo-laptop Kernel: 5.3.0-40-generic x86_64 bits: 64 
  compiler: gcc v: 7.4.0 Desktop: Cinnamon 4.4.8 
  Distro: Linux Mint 19.3 Tricia base: Ubuntu 18.04 bionic 
Machine:
  Type: Convertible System: LENOVO product: 81NW 
  v: Lenovo IdeaPad S740-15IRH Touch serial: <filter> 
  Mobo: LENOVO model: LNVNB161216 v: SDK0R32862 WIN serial: <filter> 
  UEFI: LENOVO v: BKCN20WW(V1.02) date: 07/15/2019 
Battery:
  ID-1: BAT1 charge: 4.5 Wh condition: 69.6/69.0 Wh (101%) 
  model: 0x53 0x75 0x6E 0x77 0x6F 0x64 0x PABAS0241231 status: Charging 
CPU:
  Topology: 6-Core model: Intel Core i7-9750H bits: 64 type: MT MCP 
  arch: Kaby Lake rev: A L2 cache: 12.0 MiB 
  flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 62399 
  Speed: 1800 MHz min/max: 800/4500 MHz Core speeds (MHz): 1: 1800 2: 1800 
  3: 1800 4: 1800 5: 1801 6: 1801 7: 1800 8: 1800 9: 1800 10: 1801 11: 1800 
  12: 1800 
Graphics:
  Device-1: Intel vendor: Lenovo driver: i915 v: kernel bus ID: 00:02.0 
  Device-2: NVIDIA vendor: Lenovo driver: N/A bus ID: 01:00.0 
  Display: x11 server: X.Org 1.20.5 driver: modesetting unloaded: fbdev,vesa 
  resolution: 3840x2160~60Hz 
  OpenGL: renderer: Mesa DRI Intel UHD Graphics 630 (Coffeelake 3x8 GT2) 
  v: 4.5 Mesa 19.2.8 direct render: Yes 
Audio:
  Device-1: Intel Cannon Lake PCH cAVS vendor: Lenovo driver: snd_hda_intel 
  v: kernel bus ID: 00:1f.3 
  Sound Server: ALSA v: k5.3.0-40-generic 
Network:
  Device-1: Intel Wireless-AC 9560 [Jefferson Peak] driver: iwlwifi 
  v: kernel port: 4000 bus ID: 00:14.3 
  IF: wlp0s20f3 state: up mac: <filter> 
Drives:
  Local Storage: total: 476.94 GiB used: 104.39 GiB (21.9%) 
  ID-1: /dev/nvme0n1 vendor: Samsung model: MZVLB512HBJQ-000L2 
  size: 476.94 GiB 
Partition:
  ID-1: / size: 274.98 GiB used: 104.35 GiB (37.9%) fs: ext4 
  dev: /dev/nvme0n1p5 
Sensors:
  System Temperatures: cpu: 60.0 C mobo: N/A 
  Fan Speeds (RPM): N/A 
Info:
  Processes: 350 Uptime: 5m Memory: 15.35 GiB used: 4.82 GiB (31.4%) 
  Init: systemd runlevel: 5 Compilers: gcc: 7.5.0 Shell: bash v: 4.4.20 
  inxi: 3.0.32 

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username@SRS-Lenovo-laptop:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC285 Analog [ALC285 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 9: HDMI 3 [HDMI 3]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 10: HDMI 4 [HDMI 4]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

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username@SRS-Lenovo-laptop:~$ pacmd list-cards
1 card(s) available.
    index: 0
	name: <alsa_card.pci-0000_00_1f.3>
	driver: <module-alsa-card.c>
	owner module: 7
	properties:
		alsa.card = "0"
		alsa.card_name = "HDA Intel PCH"
		alsa.long_card_name = "HDA Intel PCH at 0x604b108000 irq 178"
		alsa.driver_name = "snd_hda_intel"
		device.bus_path = "pci-0000:00:1f.3"
		sysfs.path = "/devices/pci0000:00/0000:00:1f.3/sound/card0"
		device.bus = "pci"
		device.vendor.id = "8086"
		device.vendor.name = "Intel Corporation"
		device.product.id = "a348"
		device.form_factor = "internal"
		device.string = "0"
		device.description = "Built-in Audio"
		module-udev-detect.discovered = "1"
		device.icon_name = "audio-card-pci"
	profiles:
		input:analog-stereo: Analog Stereo Input (priority 60, available: no)
		output:analog-stereo: Analog Stereo Output (priority 6000, available: unknown)
		output:analog-stereo+input:analog-stereo: Analog Stereo Duplex (priority 6060, available: unknown)
		output:hdmi-stereo: Digital Stereo (HDMI) Output (priority 5400, available: no)
		output:hdmi-stereo+input:analog-stereo: Digital Stereo (HDMI) Output + Analog Stereo Input (priority 5460, available: no)
		output:hdmi-surround: Digital Surround 5.1 (HDMI) Output (priority 300, available: no)
		output:hdmi-surround+input:analog-stereo: Digital Surround 5.1 (HDMI) Output + Analog Stereo Input (priority 360, available: no)
		output:hdmi-surround71: Digital Surround 7.1 (HDMI) Output (priority 300, available: no)
		output:hdmi-surround71+input:analog-stereo: Digital Surround 7.1 (HDMI) Output + Analog Stereo Input (priority 360, available: no)
		output:hdmi-stereo-extra1: Digital Stereo (HDMI 2) Output (priority 5200, available: no)
		output:hdmi-stereo-extra1+input:analog-stereo: Digital Stereo (HDMI 2) Output + Analog Stereo Input (priority 5260, available: no)
		output:hdmi-surround-extra1: Digital Surround 5.1 (HDMI 2) Output (priority 100, available: no)
		output:hdmi-surround-extra1+input:analog-stereo: Digital Surround 5.1 (HDMI 2) Output + Analog Stereo Input (priority 160, available: no)
		output:hdmi-surround71-extra1: Digital Surround 7.1 (HDMI 2) Output (priority 100, available: no)
		output:hdmi-surround71-extra1+input:analog-stereo: Digital Surround 7.1 (HDMI 2) Output + Analog Stereo Input (priority 160, available: no)
		output:hdmi-stereo-extra2: Digital Stereo (HDMI 3) Output (priority 5200, available: no)
		output:hdmi-stereo-extra2+input:analog-stereo: Digital Stereo (HDMI 3) Output + Analog Stereo Input (priority 5260, available: no)
		output:hdmi-surround-extra2: Digital Surround 5.1 (HDMI 3) Output (priority 100, available: no)
		output:hdmi-surround-extra2+input:analog-stereo: Digital Surround 5.1 (HDMI 3) Output + Analog Stereo Input (priority 160, available: no)
		output:hdmi-surround71-extra2: Digital Surround 7.1 (HDMI 3) Output (priority 100, available: no)
		output:hdmi-surround71-extra2+input:analog-stereo: Digital Surround 7.1 (HDMI 3) Output + Analog Stereo Input (priority 160, available: no)
		output:hdmi-stereo-extra3: Digital Stereo (HDMI 4) Output (priority 5200, available: no)
		output:hdmi-stereo-extra3+input:analog-stereo: Digital Stereo (HDMI 4) Output + Analog Stereo Input (priority 5260, available: no)
		output:hdmi-surround-extra3: Digital Surround 5.1 (HDMI 4) Output (priority 100, available: no)
		output:hdmi-surround-extra3+input:analog-stereo: Digital Surround 5.1 (HDMI 4) Output + Analog Stereo Input (priority 160, available: no)
		output:hdmi-surround71-extra3: Digital Surround 7.1 (HDMI 4) Output (priority 100, available: no)
		output:hdmi-surround71-extra3+input:analog-stereo: Digital Surround 7.1 (HDMI 4) Output + Analog Stereo Input (priority 160, available: no)
		output:hdmi-stereo-extra4: Digital Stereo (HDMI 5) Output (priority 5200, available: no)
		output:hdmi-stereo-extra4+input:analog-stereo: Digital Stereo (HDMI 5) Output + Analog Stereo Input (priority 5260, available: no)
		output:hdmi-surround-extra4: Digital Surround 5.1 (HDMI 5) Output (priority 100, available: no)
		output:hdmi-surround-extra4+input:analog-stereo: Digital Surround 5.1 (HDMI 5) Output + Analog Stereo Input (priority 160, available: no)
		output:hdmi-surround71-extra4: Digital Surround 7.1 (HDMI 5) Output (priority 100, available: no)
		output:hdmi-surround71-extra4+input:analog-stereo: Digital Surround 7.1 (HDMI 5) Output + Analog Stereo Input (priority 160, available: no)
		off: Off (priority 0, available: unknown)
	active profile: <output:analog-stereo+input:analog-stereo>
	sinks:
		alsa_output.pci-0000_00_1f.3.analog-stereo/#0: Built-in Audio Analog Stereo
	sources:
		alsa_output.pci-0000_00_1f.3.analog-stereo.monitor/#0: Monitor of Built-in Audio Analog Stereo
		alsa_input.pci-0000_00_1f.3.analog-stereo/#1: Built-in Audio Analog Stereo
	ports:
		analog-input-mic: Microphone (priority 8700, latency offset 0 usec, available: no)
			properties:
				device.icon_name = "audio-input-microphone"
		analog-output-speaker: Speakers (priority 10000, latency offset 0 usec, available: unknown)
			properties:
				device.icon_name = "audio-speakers"
		analog-output-headphones: Headphones (priority 9000, latency offset 0 usec, available: no)
			properties:
				device.icon_name = "audio-headphones"
		hdmi-output-0: HDMI / DisplayPort (priority 5900, latency offset 0 usec, available: no)
			properties:
				device.icon_name = "video-display"
		hdmi-output-1: HDMI / DisplayPort 2 (priority 5800, latency offset 0 usec, available: no)
			properties:
				device.icon_name = "video-display"
		hdmi-output-2: HDMI / DisplayPort 3 (priority 5700, latency offset 0 usec, available: no)
			properties:
				device.icon_name = "video-display"
		hdmi-output-3: HDMI / DisplayPort 4 (priority 5600, latency offset 0 usec, available: no)
			properties:
				device.icon_name = "video-display"
		hdmi-output-4: HDMI / DisplayPort 5 (priority 5500, latency offset 0 usec, available: no)
			properties:
				device.icon_name = "video-display"

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username@SRS-Lenovo-laptop:~$ dmesg | grep snd
[    5.932202] snd_hda_intel 0000:00:1f.3: enabling device (0000 -> 0002)
[    5.932340] snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
[    5.999954] snd_hda_codec_realtek hdaudioC0D0: autoconfig for ALC285: line_outs=1 (0x17/0x0/0x0/0x0/0x0) type:speaker
[    5.999956] snd_hda_codec_realtek hdaudioC0D0:    speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
[    5.999957] snd_hda_codec_realtek hdaudioC0D0:    hp_outs=1 (0x21/0x0/0x0/0x0/0x0)
[    5.999957] snd_hda_codec_realtek hdaudioC0D0:    mono: mono_out=0x0
[    5.999957] snd_hda_codec_realtek hdaudioC0D0:    inputs:
[    5.999958] snd_hda_codec_realtek hdaudioC0D0:      Mic=0x19

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Re: No sound and "Dummy Output" after upgrading to kernel 5.3.0-42 on Lenovo Ideapad S740

Post by MrEen »

Hi SRS84.

The outputs look rather normal. Could you start a song or video with no headphones plugged in then run pacmd list-sinks in the terminal and paste the output back here.

Also, if/when you have the time and the inclination, could you try the new kernel again, and before booting to it run this:

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sudo tee /etc/modprobe.d/alsa.conf <<<'options snd-intel-dspcfg dsp_driver=1'
Then reboot into the new kernel and see if that fixes the dummy output. Teeny tiny chance it might also fix the speakers, but I wouldn't really expect that.

EDIT: It's possible the sudo tee command should end with =0 instead of =1. Having trouble finding people willing to test this. The =1 line has already failed for one user, so try =0 first.

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Re: No sound and "Dummy Output" after upgrading to kernel 5.3.0-42 on Lenovo Ideapad S740

Post by SRS84 »

Here is the output from acmd list-sinks while playing a video with sound on, with the 5.3.0-40 kernel loaded:

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username@SRS-Lenovo-laptop:~$ pacmd list-sinks
1 sink(s) available.
  * index: 0
	name: <alsa_output.pci-0000_00_1f.3.analog-stereo>
	driver: <module-alsa-card.c>
	flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
	state: RUNNING
	suspend cause: 
	priority: 9039
	volume: front-left: 40629 /  62% / -12.46 dB,   front-right: 40629 /  62% / -12.46 dB
	        balance 0.00
	base volume: 65536 / 100% / 0.00 dB
	volume steps: 65537
	muted: no
	current latency: 23.35 ms
	max request: 4 KiB
	max rewind: 64 KiB
	monitor source: 0
	sample spec: s16le 2ch 48000Hz
	channel map: front-left,front-right
	             Stereo
	used by: 1
	linked by: 1
	configured latency: 23.22 ms; range is 0.50 .. 341.33 ms
	card: 0 <alsa_card.pci-0000_00_1f.3>
	module: 7
	properties:
		alsa.resolution_bits = "16"
		device.api = "alsa"
		device.class = "sound"
		alsa.class = "generic"
		alsa.subclass = "generic-mix"
		alsa.name = "ALC285 Analog"
		alsa.id = "ALC285 Analog"
		alsa.subdevice = "0"
		alsa.subdevice_name = "subdevice #0"
		alsa.device = "0"
		alsa.card = "0"
		alsa.card_name = "HDA Intel PCH"
		alsa.long_card_name = "HDA Intel PCH at 0x604b108000 irq 178"
		alsa.driver_name = "snd_hda_intel"
		device.bus_path = "pci-0000:00:1f.3"
		sysfs.path = "/devices/pci0000:00/0000:00:1f.3/sound/card0"
		device.bus = "pci"
		device.vendor.id = "8086"
		device.vendor.name = "Intel Corporation"
		device.product.id = "a348"
		device.form_factor = "internal"
		device.string = "front:0"
		device.buffering.buffer_size = "65536"
		device.buffering.fragment_size = "32768"
		device.access_mode = "mmap+timer"
		device.profile.name = "analog-stereo"
		device.profile.description = "Analog Stereo"
		device.description = "Built-in Audio Analog Stereo"
		alsa.mixer_name = "Realtek ALC285"
		alsa.components = "HDA:10ec0285,17aa383b,00100002 HDA:8086280b,80860101,00100000"
		module-udev-detect.discovered = "1"
		device.icon_name = "audio-card-pci"
	ports:
		analog-output-speaker: Speakers (priority 10000, latency offset 0 usec, available: unknown)
			properties:
				device.icon_name = "audio-speakers"
		analog-output-headphones: Headphones (priority 9000, latency offset 0 usec, available: no)
			properties:
				device.icon_name = "audio-headphones"
	active port: <analog-output-speaker>
I will try out the tee command with the new kernel running and post the results.

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Re: No sound and "Dummy Output" after upgrading to kernel 5.3.0-42 on Lenovo Ideapad S740

Post by MrEen »

Don't worry, I've discovered it won't work. I'm working with an affected user right now to find the proper fix. I'll check your output shortly.

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Re: No sound and "Dummy Output" after upgrading to kernel 5.3.0-42 on Lenovo Ideapad S740

Post by MrEen »

Follow the steps in this post to get the new kernel fixed.

Then, if there's still a problem with the speakers try this line in the terminal:

Code: Select all

apt install --reinstall alsa-base alsa-utils pulseaudio linux-sound-base libasound2

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Re: No sound and "Dummy Output" after upgrading to kernel 5.3.0-42 on Lenovo Ideapad S740

Post by D5B7 »

I followed MrEen's procedure, to modifiy the grub as explained here:

viewtopic.php?p=1778315#p1778315

Everthing works ok.
Sound is back.

Thank you very much for the help.

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Re: No sound and "Dummy Output" after upgrading to kernel 5.3.0-42 on Lenovo Ideapad S740

Post by SRS84 »

Thanks very much, MrEen, for your help with this issue.

Unfortunately, whenever I load the 5.3.0-42 kernel my system hangs on suspend, so for now I'm still using 5.3.0-40 kernel.

I made a new post about the suspend issue here: viewtopic.php?f=49&t=314595

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Re: No sound and "Dummy Output" after upgrading to kernel 5.3.0-42 on Lenovo Ideapad S740

Post by MrEen »

Okay. The suspend issue I can't help with.

For the speaker issue, I have done some research and it looks like you should be having surround sound capabilities as per here: https://www.lenovo.com/us/en/laptops/id ... cadevice=c

You dmesg output only show one pin for speakers here:

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[    5.999954] snd_hda_codec_realtek hdaudioC0D0: autoconfig for ALC285: line_outs=1 (0x17/0x0/0x0/0x0/0x0) type:speaker
[    5.999956] snd_hda_codec_realtek hdaudioC0D0:    speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
For a surround sound system, there'd have to be more pins for speakers than just 0x17. So there's some detection problem occurring here.

Do you still have Windows on the computer? If so, boot to that and see if it seems like you truly have surround sound there. Also make sure fast startup is off. Once done, shut down, don't reboot. Wait several minutes, then power up into Mint and see if dmesg | grep snd has changed.

Good luck.

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Re: No sound and "Dummy Output" after upgrading to kernel 5.3.0-42 on Lenovo Ideapad S740

Post by MrEen »

Just FYI. According to this site that Nvidia card showing in your inxi output with no driver is possibly what you'd want to be using. Look like you've been using the built-in graphics instead of the discreet card. I'm not a video guy myself, so can't really help with that either.

I found that while trying to find out if there is a BIOS update for your system. No luck so far finding out if there is.

EDIT: Looks like a BIOS update is available here: https://pcsupport.lenovo.com/us/en/prod ... s/DS541888

When navigating that site, there were 2 to choose from. I chose the one that didn't say Touch. That could mean that's the wrong result if yours is a Touch Ideapad. Oops, scratch that. The update covers all three systems (I was wrong about 2)

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Re: No sound and "Dummy Output" after upgrading to kernel 5.3.0-42 on Lenovo Ideapad S740

Post by quini »

MrEen wrote:
Wed Mar 18, 2020 5:03 pm
Follow the steps in this post to get the new kernel fixed.
Worked for me! Thanks!
MrEen wrote:
Wed Mar 18, 2020 5:03 pm
Then, if there's still a problem with the speakers try this line in the terminal:

Code: Select all

apt install --reinstall alsa-base alsa-utils pulseaudio linux-sound-base libasound2
Also I didn't need to run the above command.

Acer Swift 5, Mint 19.3

Code: Select all

quini@swift5:~$ inxi -A
Audio:     Device-1: Intel Sunrise Point-LP HD Audio driver: snd_hda_intel 
           Sound Server: ALSA v: k5.3.0-45-generic

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MrEen
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Re: [Solved] No sound and "Dummy Output" after upgrading to kernel 5.3.0-42 on Lenovo Ideapad S740

Post by MrEen »

Hi quini, and welcome to the forum.

I'm glad the fix worked for you! :D

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Re: [Solved] No sound and "Dummy Output" after upgrading to kernel 5.3.0-42 on Lenovo Ideapad S740

Post by bakersdozen »

MrEen, Thank you for your help. I have a the same laptop as SRS84. It is not clear what the solution was. It seems like SRS84 is okay with only the headphones working.

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Re: [Solved] No sound and "Dummy Output" after upgrading to kernel 5.3.0-42 on Lenovo Ideapad S740

Post by MrEen »

Hi bakersdozen, and welcome to the fourm.

Please start a new thread for your issue. There's been some pretty big changes in the audio driver since this thread started, so you may need something other than what went on in this thread.

Include in your post the outputs of inxi -Fxz, aplay -l and dmesg | grep -C1 -E 'ALSA|HDA|sof|HDMI|snd[_-]|sound|hda.codec|hda.intel' along with a description of your issue and what you may have tried.

Thanks.

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