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At various times, sound is not working after boot up. I would like to know if this is a hardware problem or a software problem. And why it is happening randomly.

I have the following:

I am using Ubuntu 18.04.4.

My computer is a Clevo N350TW.

Output from cat /proc/asound/car*/co* | grep Codec when the sound is working is:

Codec: Realtek ALC892
Codec: Intel Kabylake HDMI

(When the sound is not working, "Realtek ALC892" is missing from the output.)

Pär Johansson
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  • Welcome to AskUbuntu, please edit your Question and add your Ubuntu version i.e. 20.04/18.04 etc and type of output devices. – Sadaharu Wakisaka Aug 07 '20 at 02:40
  • Here is alsa-info when sound is not working: https://pastebin.com/hQG1mWuz – Pär Johansson Aug 07 '20 at 11:58
  • Here is alsa-info when sound is working: https://pastebin.com/pFUKnRsc – Pär Johansson Aug 07 '20 at 12:01
  • This might help https://askubuntu.com/questions/844284/no-sound-on-ubuntu-16-04-with-realtek-alc892, if not, the computer needs a new solution for the Realtek sound driver. – Sadaharu Wakisaka Aug 08 '20 at 18:48
  • Hello Sadaharu-san! I followed the steps in the link. Hope that it helps; only time will tell. (Kindly note that I randomly get this problem...) I did not download the commercial drivers, since they were dated 2018 Aug 08 and RealTek states "only support kernel version under 3.18". My Linux version is 5.4.0... Anyway, thank You for Your kind support!! – Pär Johansson Aug 09 '20 at 07:57

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