Comment 36 for bug 1784485

Hello,
sorry for my poor english, I am french.

A had exactly the same issue with a ASUS Zenbook UX433, and I fund a solution.

The issue comes from the Kernel part of the Alsa drivers.

Daniel Drake and Jian-Hong Pan provided a patch in the alsa mailing list to fix this issue for UX533/UX433 laptop (and maybe other Asus models) :
http://mailman.alsa-project.org/pipermail/alsa-devel/2018-December/142572.html

This patch is not in the current kernel, nor in 4.20rc tree as far I can see.
Fortunatly, you can find a patched version of the files in :
https://github.com/endlessm/linux/tree/master/sound
(A nice, easy to use linux distro)

What I did :
- clone official Kernel source repo (4.19-7 in my case)
- clone endless Os repo
- Copy the "sound" folder from endless tree to official kernel tree.
- Compile the "no more official" Kernel.
(I followed this tuto : https://wiki.archlinux.org/index.php/Kernel/Traditional_compilation because I use Manjaro, based on Arch) You have to find an appropriate tuto for Ubuntu. It was the firt time I compile a kernel.)
- Use this kernel : the sound work perfectly.

Note : I'm absolutly not a linux expert, it maybe exists a better way to use the patch than recompile the kernel.