[ltp] T61 Feedback noise
Sin Tzu
linux-thinkpad@linux-thinkpad.org
Sun, 30 Dec 2007 13:57:15 +0200
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this happened to me when the main volume controlled the microphone volume
mute the microphone it might solve your problem
(this can be done using a number of programs, a sure bet is alsamixer)
On Dec 29, 2007 10:43 PM, John Jason Jordan <johnxj@comcast.net> wrote:
> On Sat, 29 Dec 2007 18:37:24 +0000
> Richard Neill <rn214@hermes.cam.ac.uk> dijo:
>
> > John Jason Jordan wrote:
> > > For the past week or so I have been hearing a wailing noise and I
> can't
> > > figure out where it's coming from or what is causing it. The sound is
> > > exactly like the sound a microphone makes in an auditorium when being
> > > set up and the volume is too loud or some other component needs to be
> > > reoriented - that is, it comes and goes and it fades in and out as I
> > > move my hands around the computer. It happens only at home when the
> > > computer is docked in the mini-dock, so it must have something to do
> > > with the dock.
>
> > Is the sound coming out of the speakers? (try muting them; does it go
> > away? try plugging in headphones?)
> >
> > Your description could be exactly correct: the hand-waving will alter
> > standing waves. Try muting the speakers, or playing with the various
> > volume mixer options. I recommend gnome-alsamixer or alsamixergui - some
> > of the less common "knobs" may make a difference.
>
> Muting the speakers was the first thing I tried. Also tried plugging in
> headphones, but it didn't change anything. I also put my ear down to
> the speakers, but that didn't work because as soon as I moved my head
> the sound stopped. Ditto for putting on the headphones.
>
> If muting the speakers (both from the gnome panel applet and with the
> mute button) did not change things, then I am assuming it's not coming
> from the speakers. Also, the fact that it only happens when docked
> leads me to believe that it must be coming from the dock. But the dock
> has no speakers. So that means it must be something that is vibrating
> the metal in the dock, turning the whole dock into a loudspeaker.
>
> It's really weird. This is my first Thinkpad, have had it only about
> three months. I was hoping someone here would say that it is a known
> problem so I can stop wondering about it.
> --
> The linux-thinkpad mailing list home page is at:
> http://mailman.linux-thinkpad.org/mailman/listinfo/linux-thinkpad
>
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this happened to me when the main volume controlled the microphone volume<br>mute the microphone it might solve your problem<br>(this can be done using a number of programs, a sure bet is alsamixer)<br><br><div class="gmail_quote">
On Dec 29, 2007 10:43 PM, John Jason Jordan <<a href="mailto:johnxj@comcast.net">johnxj@comcast.net</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
On Sat, 29 Dec 2007 18:37:24 +0000<br>Richard Neill <<a href="mailto:rn214@hermes.cam.ac.uk">rn214@hermes.cam.ac.uk</a>> dijo:<br><div class="Ih2E3d"><br>> John Jason Jordan wrote:<br>> > For the past week or so I have been hearing a wailing noise and I can't
<br>> > figure out where it's coming from or what is causing it. The sound is<br>> > exactly like the sound a microphone makes in an auditorium when being<br>> > set up and the volume is too loud or some other component needs to be
<br>> > reoriented - that is, it comes and goes and it fades in and out as I<br>> > move my hands around the computer. It happens only at home when the<br>> > computer is docked in the mini-dock, so it must have something to do
<br>> > with the dock.<br><br>> Is the sound coming out of the speakers? (try muting them; does it go<br>> away? try plugging in headphones?)<br>><br>> Your description could be exactly correct: the hand-waving will alter
<br>> standing waves. Try muting the speakers, or playing with the various<br>> volume mixer options. I recommend gnome-alsamixer or alsamixergui - some<br>> of the less common "knobs" may make a difference.
<br><br></div>Muting the speakers was the first thing I tried. Also tried plugging in<br>headphones, but it didn't change anything. I also put my ear down to<br>the speakers, but that didn't work because as soon as I moved my head
<br>the sound stopped. Ditto for putting on the headphones.<br><br>If muting the speakers (both from the gnome panel applet and with the<br>mute button) did not change things, then I am assuming it's not coming<br>from the speakers. Also, the fact that it only happens when docked
<br>leads me to believe that it must be coming from the dock. But the dock<br>has no speakers. So that means it must be something that is vibrating<br>the metal in the dock, turning the whole dock into a loudspeaker.<br><br>
It's really weird. This is my first Thinkpad, have had it only about<br>three months. I was hoping someone here would say that it is a known<br>problem so I can stop wondering about it.<br><div><div></div><div class="Wj3C7c">
--<br>The linux-thinkpad mailing list home page is at:<br><a href="http://mailman.linux-thinkpad.org/mailman/listinfo/linux-thinkpad" target="_blank">http://mailman.linux-thinkpad.org/mailman/listinfo/linux-thinkpad</a><br>
</div></div></blockquote></div><br>
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