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38 Posts

01-11-2013

Seattle

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  • Message 11 of 38

Re: CPU Noise

2013-02-02, 3:27 AM

I'm wondering how prevalent this issue is.  I wish Lenovo would chime in so I can decide whether or not I want to send my machine in for service (or possibly return it to Best Buy, if this is an indication of a worsening problem).

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41 Posts

12-17-2012

Minnesota

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  • Message 12 of 38

Re: CPU Noise

2013-02-02, 3:35 AM

I think it just exists and never gets better or gets worse.  I don't think it indicates anything else failing.  My Yoga has actually been flawless other than that (no fan issue or wifi issue or anything else).

 

One of the screws on the bottom did start to come loose yesterday though, so I just went to Home Depot and got a Torx T5 screwdriver and fixed that right up.  I think it was caused by nearly two months of heavy use, but it was fine.

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31 Posts

10-28-2012

New York

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  • Message 13 of 38

Re: CPU Noise

2013-02-02, 18:02 PM

Finally tried it.  The registry key works for me.  Lets make sure we're all talking about the same thing:

 

  • The fans obviously still run the same as they always did as that's a separate issue.
  • The coil whine, which is a faint high pitched noise coming from around the Esc key when the computer is mostly idle, is gone now.  In fact, when rebooting I can hear it stop right before the lock screen appears.
  • The original post talks about a noise that appears under load, which must be something different.  The registry key is disabling low power states and those would only be used while the processor is NOT under load.  Since it mentions a scratching sound, I would suspect the fan is hitting the casing.

The first two issues are endemic to all Yogas and replacing it won't help.  However they're working on patch for the first to give you the option of a quieter but warmer Yoga, and the registry key works for the second.  The third issue, if it is the fan hitting the casing, is not normal.  Lenovo recommends sending it in for service, or you can just exchange it if it's new.

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38 Posts

01-11-2013

Seattle

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  • Message 14 of 38

Re: CPU Noise

2013-02-02, 19:37 PM

Interesting.  The sound I hear is certainly not the fan scratching.  It's a sound that occurs during heavy processing, and it's similar to the sound of an hold hard drive writing data (sort of a ticking, but higher pitched).

 

Does your "coil whine" ever change with CPU activity?  Or is it a consistent, even tone?

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31 Posts

10-28-2012

New York

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  • Message 15 of 38

Re: CPU Noise

2013-02-02, 20:05 PM

It's stuttery while the computer is working, but mostly even while the computer is idle.  The stuttering can be sort of hard drive like, yes.

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41 Posts

12-17-2012

Minnesota

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  • Message 16 of 38

Re: CPU Noise

2013-02-02, 21:06 PM

I seem to for sure have the same exact issue as you Greg (and probably pas too) so I'm thinking of trying this out now since it might work.  Have you seen a huge drop in battery life, or is it maybe just a loss of maybe 30-45 minutes or something?

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31 Posts

10-28-2012

New York

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  • Message 17 of 38

Re: CPU Noise

2013-02-02, 21:27 PM

I haven't used it much on battery since I applied it this morning, but since it's easily undoable you might as well try it for yourself.

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41 Posts

12-17-2012

Minnesota

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  • Message 18 of 38

Re: CPU Noise

2013-02-04, 0:54 AM

Coil whine or whatever it is persisted for me after applying it and restarting.

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31 Posts

10-28-2012

New York

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  • Message 19 of 38

Re: CPU Noise

2013-02-04, 3:34 AM

Sorry if this is a stupid suggestion, but just to make sure, did you put the "reg add" command into an admin command prompt?  (Start+X > Command Prompt (Admin))  If you put it into a normal command prompt or directly into the Run window it won't apply.

 

You can paste into command prompt windows by clicking the icon in the upper left and going to Edit > Paste.  Ctrl+V doesn't work in there.

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41 Posts

12-17-2012

Minnesota

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  • Message 20 of 38

Re: CPU Noise

2013-02-04, 3:36 AM
Oh no...that's not how I did it. Thank you for letting me know. Others might be making the mistake too if they're not familiar. I'll give it a try in a few minutes. Thanks again.
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