Because pulse audio made the sound out of my laptop distort very very easily at even the lowest volumes, i removed it and installed gnome-alsa instead but then now, the volume control buttons on f9 and f10 aren't working at all. I don't think gnome-alsa recognizes them. What do i do??
I had the same problem and I assigning 2 commands in that keys:
To put less volume:
To put more volume
You can change add a custom key feature in: Settings Manager > Keyboard
Also I have QasMixer GUI for Alsa that has a tray icon that shows you when the volume changes.
I hope it helps you and excuse my English.