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9 Posts

04-14-2014

Anywhere

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Coil whine issue on t440p and Windows 8.1

2014-04-14, 6:03 AM

I've just bought the new t440p (20AN0037RT).

I've changed HDD to SSD.

All last updates for BIOS, drivers and Windows installed.

I've noticed annoing coil whine noise from the top left side of laptop (and this is not a fan noise of course).

It's appears on Windows 8.1 (more when there are some bright windows on screen and less when there are only dark background). Also it's reduces while any program has screen activity or simple moving cursor.

 

In BIOS it's not audible.

I've also boot from life Ubuntu usb-flash and there are also nothing like this.

 

Where can be the problem? Can anyone, who using Win8 on t440p check this?

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9 Posts

04-14-2014

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Re: Coil whine issue on t440p and Windows 8.1

2014-04-15, 17:08 PM

anyone?

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9 Posts

04-14-2014

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Re: Coil whine issue on t440p and Windows 8.1

2014-04-17, 7:44 AM

Here is some investigations and suggections:

 

First method to stop the whine:

HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Control \ Power \ PowerSettings \ 54533251-82be-4824-96c1-47b60b740d00 \ 5d76a2ca-e8c0-402f-a133-2158492d58ad
in ATTRIBUTES change the 1 to a 0


then Go to Control Panel --> Hardware and Sound --> Change Plan Settings (for each plan that you use) -->
POWER OPTIONS --> Advance Power Settings --> Processor Power Management --> Processor Idle Disable

 

Whine stop right after we press apply!

 

But processor now begin to work at maximum frequency all the time and all the time fans are on now.

BAD WAY.

 

Second method to stop the whine:

This method will disable the ACPI C2-state and C3-state by setting a registry key.

reg add HKLM\System\CurrentControlSet\Control\Processor /v Capabilities /t REG_DWORD /d 0x0007e066

 

and reboot the machine.

Whine stops after reboot, and processor seems to work fine, but without c2 and c3 states it's often get hot and turn on fans.

 

Better then previous method, but it's also significaly decrease battery life and often turn on fans!

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9644 Posts

12-27-2009

Canada

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Re: Coil whine issue on t440p and Windows 8.1

2014-04-17, 19:14 PM
I heard running a blank audio file on loop might mitigate CPU whine. Your mileage may vary.

W520: 2960XM, Q2000M @ 1091/1380, 32GB RAM, 500GB&750GB HDD & 500GB SSD, FHD&MB168B+
X61T: L7500, 4GB RAM, 500GB HDD, XGA screen, Ultrabase
W550s: 5600U, K620M at 1164/1281, 16GB RAM, 512GB SSD, 3K touchscreen
X200s: SL9400, 6GB RAM, 64GB SD card, WXGA+ screen
TPT1: 1839-23U
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9 Posts

04-14-2014

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  • Message 5 of 12

Re: Coil whine issue on t440p and Windows 8.1

2014-04-17, 19:18 PM
Sounds like a joke)
What kind of blank audio file you mean?
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9644 Posts

12-27-2009

Canada

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Re: Coil whine issue on t440p and Windows 8.1

2014-04-17, 19:55 PM
Apparently having an audio file running produces enough CPU load to keep it from whining. By blank audio file I mean a WAV or MP3 with no sound at all.

A shot-in-the-dark fix might be to _slightly_ tighten/loosen some combination of the heatsink screws to see if a change in heatsink pressure changes the whine.

W520: 2960XM, Q2000M @ 1091/1380, 32GB RAM, 500GB&750GB HDD & 500GB SSD, FHD&MB168B+
X61T: L7500, 4GB RAM, 500GB HDD, XGA screen, Ultrabase
W550s: 5600U, K620M at 1164/1281, 16GB RAM, 512GB SSD, 3K touchscreen
X200s: SL9400, 6GB RAM, 64GB SD card, WXGA+ screen
TPT1: 1839-23U
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9 Posts

04-14-2014

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  • Message 7 of 12

Re: Coil whine issue on t440p and Windows 8.1

2014-04-21, 7:38 AM

Well, running a black audio file it's really not better decision then disable deep sleep.

 

Tighten/loosen some combination of the heatsink screws also don't bring any effect.

 

Whine goes not from the processor, but from components somewhere near it (capacitors or something like this).

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1 Posts

10-29-2014

Ottawa

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  • Message 8 of 12

Re: Coil whine issue on t440p and Windows 8.1

2014-10-29, 1:01 AM

I have this problem as well.

Lenovo is refusing to resolve the problem.

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9644 Posts

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Canada

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  • Message 9 of 12

Re: Coil whine issue on t440p and Windows 8.1

2014-10-30, 1:29 AM
Try asking warranty to replace your CPU. Some batches are better than others.

W520: 2960XM, Q2000M @ 1091/1380, 32GB RAM, 500GB&750GB HDD & 500GB SSD, FHD&MB168B+
X61T: L7500, 4GB RAM, 500GB HDD, XGA screen, Ultrabase
W550s: 5600U, K620M at 1164/1281, 16GB RAM, 512GB SSD, 3K touchscreen
X200s: SL9400, 6GB RAM, 64GB SD card, WXGA+ screen
TPT1: 1839-23U
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50 Posts

02-16-2015

Czech Republic

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  • Message 10 of 12

Re: Coil whine issue on t440p and Windows 8.1

2015-03-26, 11:21 AM

I tried some i5 and i3 CPUs and all had this issue. I replaced motherboard and have the same issue. Where can be a problem?


T440p: Core i7-4700MQ, 16GB RAM, 2TB HDD + 256GB M.2 SSD + 512GB SSD in bay, FullHD IPS, 9-Cell, Windows 7 Pro
L440: Core i5-4300M, 16GB RAM,500GB HDD + 128GB M.2 SSD, Windows 7 Pro
X230: Core i5-3380M, 16GB RAM, 500GB HDD + 120GB mSATA SSD, 9-Cell, Windows 7 Pro
E220s: Core i7-2617M, 8GB RAM, 500GB HDD, Windows 7 pro
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