Bug 213641

Summary: No sound from speakers using Realtek ALC711
Product: Drivers Reporter: Roland (kernel)
Component: Sound(ALSA)Assignee: Jaroslav Kysela (perex)
Status: RESOLVED IMPLEMENTED    
Severity: normal    
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 5.13 Subsystem:
Regression: No Bisected commit-id:

Description Roland 2021-07-04 15:43:23 UTC 
I have a Dell Latitude 9420 which contains with a Realtek ACL711-VD audio chipset. The headphone jack works since Kernel 5.13-rc5, and the internal microphone seems to be working, too.

But the internal speakers do not. I can select them as audio devices, but they remain silent.

This looks very similar to the problems reported in bug #208555 regarding the ALC287 on new Lenovo laptops, although the initialization verbs provided there seems to not have any effect on the ACL711.

I've already tried to use a Windows VM with qemu to extract my own set of verbs (as suggested in https://bugzilla.kernel.org/show_bug.cgi?id=208555#c205), but I failed to get the device working in Windows. The device shows an error called "failed to setdx on fw" in Windows' Device Manager.

Output from alsa-info is available at http://alsa-project.org/db/?f=e49d87d2ee7caec416dd9c576b066be03bed6090
Comment 1 Roland 2021-11-01 09:04:07 UTC 
I'm now quite sure what did the trick, but now on Ubuntu 20.04 with latest updates and mainline kernel 5.14.2 the speaker works.
Comment 2 Roland 2021-11-01 09:04:29 UTC 
Sorry, it's Ubuntu 21.04