Comment 9 for bug 1859754

Recently some users reported the headset-mic input volume is too low, after installing the 1.1.9-0ubuntu1.1 on eoan and 1.1.3-5ubuntu0.3 on bionic, I reproduced the issue of "headset-mic input volume is too low", so please drop the debdiff of #1 and #2, I will upload new debdiffs which put the input volume higher.

Verification failed on Eoan (input volume is to low):
On a machine of Lenovo X1 Carbon 7th, I already installed 19.10 (eoan) on it, then run sudo apt install libasound2, then the libasound is upgraded to 1.1.9-0ubuntu1.1, check the /usr/share/alsa/ucm, all expected folders and files are there. upgrade the linux-firmware to 1.183.4, put snd_hda_intel and snd_soc_skl in the /etc/modporbe.d/blacklist.conf, reboot

now we could see speaker, dmic from gnome-sound-setting, if plug headset, we could see headphone and headset-mic from UI, if we plug hdmi monitor with audio capability, we could see hdmi-audio from UI, all worked as expected.

But there is one issue, for headset-mic, we need to set the input volume to maximum from UI, otherwise I couldn't record any sound.

Verification failed on Bionic (input volume is to low):
On a machine of Dell vistro 5390, I already installed 18.04 (bionic) on it, then run sudo apt install libasound2, then the libasound is upgraded to 1.1.3-5ubuntu0.3, check the /usr/share/alsa/ucm, all expected folders and files are there. upgrade the linux-firmware to 1.173.15, Install the linux-oem-osp1 kernel, put snd_soc_skl in the /etc/modporbe.d/blacklist.conf, reboot

now we could see speaker, dmic from gnome-sound-setting, if plug headset, we could see headphone and headset-mic from UI, if we plug hdmi monitor with audio capability, we could see hdmi-audio from UI, all worked as expected.

But there is one issue, for headset-mic, we need to set the input volume to maximum from UI, otherwise I couldn't record any sound.