I have a two fold issue since many years. I hope to find a fix now. I'm on Ubuntu Budgie 18.04 and yet again the volume levels are very low.
- Allow louder than 100% option is gone from the sound settings in Ubuntu Budgie 18.04. So I worked around it using
pactl set-sink-volume 0 150%
- Whenever I hit the volume up/down key, the volume resets to 100%. Then I will have to do
pactl set-sink-volume 0 150%
again to get louder volume from the speakers.
How do I make, say
150%
permanent and map the volume keys to work from0-150%
You should have a setting called Over-Amplification in Settings > Sound. Turning it on and adjusting the volume slider above it will only get you to 100%, but you can still adjust beyond 100% by using either your keyboard's volume buttons if available, or adjusting the volume slider in the corner of your screen.
You can install pavucontrol, it let's me tune up to 153% on Ubuntu Gnome 18.04. There is also a setting in dconf
/com/ubuntu/sound
called 'allow-amplified-volume' but switching that true/false had no effect for meUbuntu 18.10 (cosmic) adds this feature by default. It works very nice too.