try 'alsamixer' in the terminal. use the arrow keys to move through the channels and m to mute/unmute. when ever I run into an audio problem on my Thinkpad T40, its usually just a muted channel. <div> On 7/17/07, Harry Wert <<a href="mailto:harry.wert@gmail.com">harry.wert@gmail.com</a>> wrote:<blockquote class="gmail_quote" style="margin-top: 0; margin-right: 0; margin-bottom: 0; margin-left: 0; margin-left: 0.80ex; border-left-color: #cccccc; border-left-width: 1px; border-left-style: solid; padding-left: 1ex"> All has been well with Ubuntu Feisty release until I apparently inadvertently fouled up the laptop volume control - how I do not know. In any event I still get the on-screen display depicting volume control when I press the appropriate button; ie, "mute", "volume increase", or "volume decrease". The downside is the sound is now unaffected. I can still point to the panel which displays the volume symbol with the mouse and everything is correctly controlled. I have done the usual looking for an "accidentally installed" mixer, but the only one I can find is the one for Gnome - which is correct. Can anyone suggest how I can isolate this problem. It's trivial but annoying! Thanks in advance, Harry -- ubuntu-users mailing list <a href="mailto:ubuntu-users@lists.ubuntu.com">ubuntu-users@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-users"> https://lists.ubuntu.com/mailman/listinfo/ubuntu-users</a> </blockquote></div>