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. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1784485 Title: [ZenBook S UX391UA, Realtek ALC294, Mic, Internal] No sound at all To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1784485/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs