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Well, my problem is that I press the volume control on the keyboard, I see the bar in the screen going down, but it doesn't do anything until it's at 0. So the volume is on 0 or 100%.

I have done many things trying to fix it. Finally, I did something that I read here How do I change the way Ubuntu adjusts my volume mixer levels? , and it works, but not forever. For example, the solution just remains one song in YouTube. After that, again, very loud sound or silence. I go by the terminal to check /etc/pulse/default.pa and everything is ok, like I left it before.

I don't know what to do. I'm getting crazy.
Thank you so much for your time!

EDIT: I had Windows 10 before in this PC, but I reformatted to Ubuntu 18.04.3 LTS. The model is an ASUS ZENBOOK UX490U. And finally, typing lspci -v | grep -i vga in the terminal, I get this:

00:02.0 VGA compatible controller: Intel Corporation HD Graphics 620 (rev 02) (prog-if 00 [VGA controller])

Rafa Benavent
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  • Which version of Ubuntu are you using? 2) Which release number? 3) Was it a new install or an upgrade from a previous version? 4) What's the make and model of your PC? Please get the model number from the sticker on the bottom which also has the serial number; other model numbers on top, front, bezels, lids, or surrounds don't provide the info we need. 5) Please run lspci -v | grep audio in a terminal; copy the results, then come back here and click [edit] to provide that info as well as the answers to 1-4.
    • – K7AAY Nov 01 '19 at 20:33
  • Please check this answer if you have ZenBook. https://askubuntu.com/questions/906303/volume-control-on-asus-zenbook-3 – JulienV Sep 18 '20 at 15:28