<div class="gmail_quote">On Wed, Sep 30, 2009 at 10:12 PM, Yu Lex <<a href="mailto:lex.yucai.yu.fedora@gmail.com">lex.yucai.yu.fedora@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hello, My headphone worked before, however, after some installation and update, I found there was no sound on my T61 any more. I have tried "alsamixer -c0" or "gst-mixer" to unmute all "MM" stuff, however it did not work. At present, the only thing I can hear is the electronic noisy in my headphone. Could anybody help me? Any comment will be really appreciated!! Thanks in advance. Lex -- fedora-list mailing list <a href="mailto:fedora-list@redhat.com">fedora-list@redhat.com</a> To unsubscribe: <a href="https://www.redhat.com/mailman/listinfo/fedora-list" target="_blank">https://www.redhat.com/mailman/listinfo/fedora-list</a> Guidelines: <a href="http://fedoraproject.org/wiki/Communicate/MailingListGuidelines" target="_blank">http://fedoraproject.org/wiki/Communicate/MailingListGuidelines</a> </blockquote></div> Are there physical mute and volume buttons on your laptop? I have pressed the mute button on occasion, which appeared to break the sound. Pressing the volume-up button brings it back.