Step 1
vim /etc/pulse/daemon.conf
Then find and change line with flat-volumes to
flat-volumes = no
After that we have to restart pulseaudio without ...
Step 1
vim /etc/pulse/daemon.conf
Then find and change line with
flat-volumes to
flat-volumes = no
After that we have to restart pulseaudio without restart
pulseaudio -k
pulseaudio -D
Source solution note is
here