Hello, <br><br>My headphone worked before, however, after some installation and update, I found there was no sound on my T61 any more. I have tried &quot;alsamixer -c0&quot; or &quot;gst-mixer&quot; to unmute all &quot;MM&quot; 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!!<br>

<br>Thanks in advance.<br><br>Lex<br>