What fedora version are you using?
I could tell you to do a lot of things, but I don't want to insult your intelligence.
I could tell you to go into a terminal by pressing "Alt+f2" and type xterm and type: "alsamixer"
Or I could tell you to go to "Applications" & "Sound & Video" & "PulseAudio volume control"
Or I could tell you to right click on the sound icon if your using gnome, and open volume control. Then Edit > Preferences > Then check the Microphone.
Or I could tell tell you to try "yum -y install alsa-tools" from a terminal, and run "envy24control" from a terminal if your soundcard is supported.
Or I could tell you to output your modules using "lsmod" so we could figure it out from there.
Or I could tell you to install Alsa.
Or I could tell you to customize your kernel by digging through the source and program your own device.
Last edited by Armpit; 7th August 2008 at 08:18 AM.