This issue is going to be fixed on 19.10 (Eoan) together with internal mic issue (dmic issue).
Please wait for the 5.3.0-20-generic kernel or later ones, then install an package:
sudo add-apt-repository ppa:xueshengyao/dmic
sudo apt-get update
sudo apt install oem-dmic-sof-lp1825294
reboot
Then the speaker's output volume will be adjustable and the dmic can work.
This issue is going to be fixed on 19.10 (Eoan) together with internal mic issue (dmic issue).
Please wait for the 5.3.0-20-generic kernel or later ones, then install an package: /dmic sof-lp1825294
sudo add-apt-repository ppa:xueshengyao
sudo apt-get update
sudo apt install oem-dmic-
reboot
Then the speaker's output volume will be adjustable and the dmic can work.