[ltp] OT: Lenovo Return Policy Advice

Tue, 19 Feb 2008 10:04:23 +0100

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here with t60 removing uhci_hcd helps without needing to limit the cpu 
to suck far too much power

Marius Gedminas schrieb:
> On Mon, Feb 18, 2008 at 09:08:21PM -0500, Michael B Allen wrote:
>> On 2/18/08, Derek Dolney <nospam@dolney.com> wrote:
>>> This rang a bell for me. When I first got my T61, somehow the internal
>>> microphone gain was turned up all the way and the internal speaker, too.
>>> That gave a lot of screechy feedback, and pushing the keys made
>>> interesting echo sounds. It's probably a long shot, but check that your
>>> mics are turned down and/or mute your speakers before you return it.
>> I don't think that's the problem. To me more specific, if the power
>> cord is not connected, there is a high pitched sound coming from under
>> the escape key and when I click on links the speakers pop. Same
>> behavior in Linux and XP. Definitely something electrical and the
>> hardware support guys agreed.
> 
> Hm, I hear a high-pitched whine from my T61 when it's on battery power.
> Restricting the CPU to the C2 power-saving state stops the whine.
> 
> Check out this page:
> http://www.thinkwiki.org/wiki/Problem_with_high_pitch_noises
> 
> Marius Gedminas

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