I have a laptop that I frequently use during lectures. To do so I want the sound to be turned of, hence I mute the master volume/scale it down to 0%
Then when something triggers a system message like "The powercord has been unplugged" the master volume gets automatically scaled up to 100% and unmuted to play a notification sound.
How do I disable this feature?
So far I have only the workaround of muting/scaling down the volumen of the PC Speaker, which is not effected by the system message. However, this has the drawback that I need to open alsamixer (as the volume control is not visible in KMix for some reason) and turn it on as long as I want speaker sound and then I must remember to turn it off when I do not want it anymore (which is not done via "normal" multimedia keys).
The laptop is a Lenovo G780 with an Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller.
I have installed pulseaudio.