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My issue is that I am getting a high pitched noise from my speakers. When I connect my laptop to my Toshiba 32L2300U and then play any form of audio or dial the volume bar, I will hear a high pitched noise coming from my TV.

The high pitch sound persists and the only way to shut it off is to mute my TV not my laptop. When I boot my laptop to windows this problem does not occur. I found that this issue only occurs when I boot Ubuntu when connected to my TV.

I have tried turning the PCM output volume from merge to ignore and then rebooted the system but no change. I am not sure what the problem is, but I believe it is an ubuntu problem. I also have version 18.04 of Ubuntu. (edit: the noise does not happen when I use my laptop speakers, it only happens when I use my TV speakers)

FranticCelery
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  • I just noticed that last night with kernel update to 4.15.0-33 when sound should have gone to first TV (nVidia GTX970M controlled) but it went to second TV (Skylake Thunderbolt Intel HD 530 GPU controlled). I rebooted with 4.13.0-36 and life is back to normal :) In your case, reboot and select grub's Advanced Options submenu and select an older kernel. If you don't have any older kernels that work you can install one using this guide: https://askubuntu.com/questions/119080/how-to-update-kernel-to-the-latest-mainline-version-without-any-distro-upgrade – WinEunuuchs2Unix Aug 26 '18 at 18:19
  • I just rebooted with 4.13.0-36. But that didn't resolve the issue. I still get the high pitch whine noise, but instead of a single beep. Its become a string of small high pitch noise, so like beep beeep beeeeeeep beep. – FranticCelery Aug 26 '18 at 19:45
  • The problem could be my TV, as I do not hear a ringing sound when I connect my laptop to another TV; but the weird thing is that my TV only rings with ubuntu booted and not windows booted – FranticCelery Aug 26 '18 at 20:11

1 Answers1

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At first I thought it was only 4.15.0-33 kernel but yesterday I noticed it briefly in Windows 10 too. Again it happened on the secondary TV When signing in via Chrome to a password enabled website.

Then today under Kernel 4.13.0-36 I noticed system notification sound for volume change (that popping bubble sound) was coming from second TV driven by Intel HD 530 over USB-C Thunderbolt Display Port to HDMI converter whilst real sound internet video / news channels were coming from main TV driven by nVidia.

So I did a quick screenshot so you could see the setup:

App sound to nVidia and system sound to intel.png

I am using a special kernel module for nVidia sound due to newer Dell Laptops powering off the sound card in newer nVidia Cards to save 5 watts of electricity: https://github.com/hhfeuer/nvhda (not the exact github link but close enough).

Hopefully this helps. If not yourself then others at least.

Community
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WinEunuuchs2Unix
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  • Not sure what to do, but some notes I wanted to add, I run a lenovo x260 with a soundcard of HDA Intel PCH. I also noticed that the ringing from my TV also plays when I using my headphones as the output. A single beeping sound can be heard every time I adjust the volume until it just become a continuous beeping/ringing sound, which is very annoying. But are you suggesting that I change my sound card? – FranticCelery Sep 08 '18 at 13:45