Midnight Oil

I recently switched from Gnome to KDE. One thing I noticed was the my volume up / volume down keys stopped working. The on-screen volume meter showed up, and reflected changes when I hit volume up or down, but it wasn’t changing my sound.

If I had kmixer open, I could see that the keys were manipulating the PCM channel, not the Master or Front channels. A Google search later turned up a ticket on Launchpad. Turns out all you need to do is right click on the volume icon in the system tray and select “Select Master Channel…”.

For me, “PCM” was selected. I changed it to “Master” and viola