I've had this problem since I fresh installed Fedora on my laptop: I can play sounds fine, but I can't mute/make it louder or softer. I couple days ago (right after I installed) there was a notification saying there was an error with something in the sound and it was "falling back to default". Recently, the notification stopped popping up but the problem persists.
I'm not 100% positive as to what type of speakers my laptop has. I know they're made by JBL, but on Windows they're handled by "RealTek HD Audio Manager" and in Device Manager there's 2 different audio devices: Realtek High Definition Audio and ATI HDMI Audio. Neither of them say they're JBL brand. The most information I can get out of the specs of my laptop found on Newegg is that they're "JBL stereo speakers (1.5 watt x 2)".
What could be happening? Is it a driver problem? How can I fix it?
Thanks for any help you can give.
P.S- I'm running the KDE Spin of Fedora 15, so I have a different utility for controlling audio than GNOME users do.