Disabling "CPU Power Management" through BIOS -- any bad consequences?

Ok, so my new T440S is emitting a most annoying high-pitched noise. After doing some research, I come to the conclusion that it is the so called CPU Whine.
According to the diagnostics provided on this page:
http://forums.lenovo.com/t5/T400-T500-and-newer-T-series/T510-T410-W510-ThinkPad-high-pitched-whine/...
Disabling CPU Power Management may silence the noise - as a diagnotic measure, not a solution (as the post asks the user to contact Lenovo support for assistance).
So I tried that and indeed it silences the annoying whine. I have already contacted Lenovo and they said they will get back to me after Christmas. Meanwhille, I am still using this computer, and I am keeping the setting for CPU Power Management Disabled, until Lenovo solves the noise problem.
I was wondering if this (keeping the CPU Power Management disabled) may have some bad consequences - like melting some parts down or something. Would anyone know?
Thanks!

Hi yinslaptop!
I have good news. I have the same problem. My T440s is completely quiet at 43 °C CPU so I don't need any fans to spin. However there is a slight buzz coming out of the middle of the laptop. And it isn't coming from the speakers nor the fan. I didn't bother to open it up yet and check what is causing that noise, but I guess it's related to some coil whine or voltage leakage. As in your case, when I turn off the CPU Power Management option in the BIOS, the sound dissapears completely.
HOWEVER I conicidentally put one SD Card Adapter into the Card Slot and the sound completely dissapeared. I would say give it a try. Sadly the sound comes back in 20 seconds at my machine, but I am using a Sd card adapter with no card in there. Maybe this will change when I put one in. Have to test, because I don't have one lying around.
Lenovo has done a great job. You could to better at this price range, especially when the pc market is shrinking .. it's survival of the fittest. You will see what I mean when you won't get foothold in US and Europe anymore and only will supply Asia.
You won't probably answer this thread and when you do "awww yes, we are deeply sorry, some level buzz is completely normal" CTRL+V bull**bleep**.
Don't get me wrong. I really like the new T440s as my first ThinkPad, but my high order of quality wasn't meet. However I still bought it, because I needed one laptop with really good battery life, good screen and small footprint. Well sorry for the rant.

Similar Messages

W520 freeze caused by "CPU power managment in BIOS"

I have been running my Thinkpad W520 seemlessly for the past 4 years.
It started to freeze last monday on win7. Freezes increased rapidly and then occured at logon.
I was able to run win7 in safe mode.
Unable to reinstall win7 or even ubuntu.
Unplugged all peripheral without any succes, then disabled everything in the BIOS (1.41) and it worked again.
It looks like the "CPU power management" causes the freezes. with it disabled, everything is running back.

Hi paa55112
If I am not wrong, none other than reduced battery life.
For SSD, you could try PerfectDisk and use SSD Optimize to improve 4K read / write performance
More information about SSD Optimize
http://www.raxco.com/ssd-optimization.aspx
http://blog.raxco.com/2011/11/16/how-to-optimize-your-ssd-without-wearing-out-its-lifespan/
http://forums.whirlpool.net.au/archive/1725746
Have a nice day!
Peter
W520 (4284-A99)
Does someone’s post help you? Give them kudos as a reward, as they will do better to improve | Mark it as solved if the solution works for you, so it could be reference for others in the future
=====================================
Sound Enthusiast and Enhancement (Post comments, share mixes, etc.)
http://forums.lenovo.com/t5/General-Discussion/Dolby-Home-Theater-v4-for-most-Lenovo-Laptops/td-p/62...

What does 'CPU Power Management' BIOS setting do?

On many threads people (and Lenovo tech support) have recommended disabling 'CPU Power Management' in BIOS as a workaround for the common high-pitched noise problem. I assume this negatively affect battery life, but am wondering if anyone knows what exactly the option does and by how much disabling it hurts battery life.
Thanks,
Josh

Does it prevent all CPU state changes or only certain ones (e.g., C3/C4)? And does it have any other affect? I ask because Lenovo tech suport disabled it to combat a whining noise and I'd like to understand the implications. Also, if it just is altering CPU state changes, I think that can be accomplished in software.
Thanks

T60p - Chirping noise with CPU power management

I've bought a T60p which produces a chirping noise when running on battery. The high frequency noise is disturbing when working with the device, especially in silent surroundings.
I've already contacted the Lenovo Support and they advised me to turn off CPU power management in the BIOS which indeed removes the noise. However, the cost is a significantly reduced battery time.
First the Lenovo guys offered me a high capacity battery to compensate the shorter run time but then they refused and stated that my computer "works as designed" and that "Lenovo doesn't accept warranty".
I can't believe that this is true. IBM and the ThinkPads have been recognized for their excellent quality and customer service for many years. That's why I bought a TP despite it was way more expensive than other Notebooks. Is Lenovo really not interested in keeping the excellent reputation that IBM formerly had? I'd be very interested in a statement of a Lenovo official on this issue...

> every CD/C2D processor makes this noise regardless of notebook manufacturer.
Nope, not every. There are C2D ThinkPads and other manufacturer notebooks without this defect. Sometimes noise level is higher, sometimes lower, sometimes completely silent if you are lucky enough...
amaso, I have the same problem on my brand new T60p, and found a better solution. Try to download RMClock and disable PopUp mode in CPU advanced settings. This eliminated the noise for me and power management still is working.

Efficiency of CPU Power Management (T510)

Hello and sorry in advance for my average english,
i bought a ThinkPad T510 and I had the same problem like many others.
A whitsling noise appeared when I disconnected the charger.
As read on many websites, I deactivated "CPU Power Management" in the BIOS.
And actually the noise disappeared.
Now i've got the question, if there's a big difference between the settings "Automatic" and "Disabled".
How fast gets the battery empty?
I want to decide, if I endure the annoying noise (if the difference is big) or not.
Thanks in advance,
eXtense

Hi
Changing the CPU Power Management does not make the much difference in battery backup.
However, I will advice you to update the BIOS of the notebook which will keep the system working fine.
Best Regards,
Tanuj
Did someone help you today? Press the star on the left to thank them with a Kudo!
If you find a post helpful and it answers your question, please mark it as an "Accepted Solution".! This will help the rest of the Community with similar issues identify the verified solution and benefit from it.
Follow @LenovoForums on Twitter!

Toshiba power management and BIOS-Satelite M30X

Hi!
I've just installed XP PRO with SP2. I tried to install Toshiba Power Management tool. At the end of installation blue screen appeared and system rebooted. I tried bios upgrade (windows flash)and just after flash procedure started system hanged.
Icouldn't reboot even pressing poweroff button for several sec's. What is the problem? If possible reply also for private email [email protected]

Hi,
had you read the "Driver Update Information for Windows XP with Service Pack 2" which is available at http://eu.computers.toshiba-europe.com in the driver download section!
For BIOS update I can only say, if the notebook doesn't start anymore after BIOS update, you have to contact a Toshiba Service Partner for diagnostics! When you see the red Toshiba logo at boot up you can try it again.
At http://www.toshiba-tro.de/gcc/biosinfo/index.html you will find some further infomations about BIOS update procedures!
Bye

G510s/windows 8.1 sleep problems (power management options & BIOS do not correct it)

hi there,
suddenly seemingly for no reason, the sleep function of my machine no longer works properly. when the machine goes to sleep, it either shuts itself off or goes into unwakable hibernation, in which case i must shut the machine off improperly and crash my open files. the fan also stays on non-stop when it is in unwakable hibernation.
i have changed the power management options numerous times based on suggestions i have read about or been told via lenovo support, and in each case, the sleep function works properly the next 5 times or so, but then the same old problem arises again.
in addition, i now receive pop-up boxes every time i turn the machine on that indicate that the start menu has been updated, and it asks me if i want to install skype, etc. this is now a daily occurrance, and i wonder if it is related to the sleep problems, or if this is a new unrelated glitch.
please tell me how to fix the machine, keeping in mind that i have already changed the power settings numerous times to no avail. in addition, my BIOS is and always has been up to date, as this is a brand new machine.
thanks very much in advance,
tamara

After upgrading to Windows 8.1 did you install the appropriate chipset driver and IMEI software?
Which BIOS version did you install?
****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer

TRYing to locate power management in bios

Trying to make computer start up in the morning at 8:00; cant find power management in bios

Hi mickey16,
I understand you would like your computer to start at 8 AM automatically. Take a look at the following article: How to Turn ON your PC automatically. As it suggests, it may take a little searching, or, depending on your computer model, it might not have the setting to accomplish this task. Let me know if this helps. Best of luck to you.
Ryan1216
I work on behalf of HP
The advice and opinions given here are my own and not those of HP

T400: How to disable the Intel Management Engine Bios Extension?

The first thing my T400 (type 6474-BD2) does at boot up is to initialize the Intel Management Engine Bios Extension.
This takes about 2 minutes before the operating system boots.
Do I really need this?
Is there a way to switch this off?
Thanks,
Arjen

If i'm right, it is Intel AMT - in the BIOS under "Config" - "Intel (R) AMT"
My home-forum: http://www.thinkpad-forum.de
Wiki: Deutsches ThinkPad-Wiki English ThinkWiki
My ThinkPad-Collection

CPU Power Management Setting in BIOS

What is the downside to disabling this setting in BIOS other than reduced battery life?
I'm trying to improve AS SSD "4K-64Thrd" performance on my SSD.
Thanks
W520 4270-CTO | 2720QM | 16 GB RAM | Quadro 1000M | BIOS 1.34 | PwrMgr 3.66 | 256 SSD

Hi paa55112
If I am not wrong, none other than reduced battery life.
For SSD, you could try PerfectDisk and use SSD Optimize to improve 4K read / write performance
More information about SSD Optimize
http://www.raxco.com/ssd-optimization.aspx
http://blog.raxco.com/2011/11/16/how-to-optimize-your-ssd-without-wearing-out-its-lifespan/
http://forums.whirlpool.net.au/archive/1725746
Have a nice day!
Peter
W520 (4284-A99)
Does someone’s post help you? Give them kudos as a reward, as they will do better to improve | Mark it as solved if the solution works for you, so it could be reference for others in the future
=====================================
Sound Enthusiast and Enhancement (Post comments, share mixes, etc.)
http://forums.lenovo.com/t5/General-Discussion/Dolby-Home-Theater-v4-for-most-Lenovo-Laptops/td-p/62...

Script to disable USB 'Power Management'?

I'd like to have the capability to have the "Allow the computer to switch off the USB port to conserve power' box unchecked. Instead of manually going to each PC, it would be great if I could run a script. Anybody out there know how to
do this? Any help is gratefully appreciated.
Thank you,
Joao

start here:
http://blogs.technet.com/b/askds/archive/2008/03/17/managing-power-with-group-policy-part-1-of-3.aspx
¯\_(ツ)_/¯

Macbook Late 2011 freezing, problem with CPU power management.

Hi everyone.
I have Macbook Pro 15 Late 2011. And i have a problem with it.
When laptop is cold, sometimes, it can freeze. Other then this there's no problems with it, no problems at all.
I solved this problem by deleting AppleIntelCPUPowerManagement.kext, so for now it's getting a little hotter (not very).
And my question: is there any utility or app, which could let me see what AppleIntelCPUPowerManagement.kext is doing with system, so i could see what causing freezes. I don't have apple services in my country, so i can't bring this laptop to repair.
And if you don't know answer to this question, but know forum, where i might find answers, please write it.
Thanks in advance.
Sorry for language, i'm not an english speaking.

Catfish, if you're on AC power, and you don't run with a fully charged battery in the machine, then it won't run at full performance. Plus, if the battery is worn out, then it won't charge to nearly its original full capacity, and thus the machine won't run at full performance on AC power.
Note that, if you leave the battery in a drawer for months without using it, that can kill the battery.
Good luck!

Disabling power management on wireless nic

Hi,
Is it possible to disable the power management/power save mode for the wireless nic in os x? In ubuntu, it can be done using iwconfig (ex. iwconfig wlan0 power off )
Thanks.

True, the connection doesnt get lost, but the Cisco Lightweight Access Points recognise the Macbook has dropped into a Low power/Power management state after a few minutes of no network activity. A show client on the console of the WLAN controller shows the client has dropped into a power management state after a few minutes of inactivity, not inactivity on the machine, but network inactivity.
WLANCONTROLLER#>show client detailX.X.X
Client MAC Address............................... X.X.X.X
Client Username ................................. XXXXX
AP MAC Address................................... X:X:X:X:X
AP Name.......................................... AP_XX
Client State..................................... Associated
Client NAC OOB State............................. Access
Wireless LAN Id.................................. 2
BSSID............................................ X:X:X:X
Connected For ................................... 350 secs
Channel.......................................... 161
IP Address....................................... X.X.X.X
Association Id................................... 6
Authentication Algorithm......................... Open System
Reason Code...................................... 1
Status Code...................................... 0
Client CCX version............................... No CCX support
Re-Authentication Timeout........................ 82958
Mirroring........................................ Disabled
QoS Level........................................ Silver
802.1P Priority Tag.............................. disabled
WMM Support...................................... Enabled
Power Save....................................... ON
Current Rate..................................... m15
This is enough to force a full re-auth of the client
Apple clients dont support Cisco CCX extensions so Key Caching cant occur, and full re-auth is required, which can cause client to lose connection.
If the client could be forced to keep the WLAN card active when the macbook is on there would be no issue. Seeing as OSX is based on linux, one would assume this would be a possibility to have this available as an option, even if it doesnt exist currently surely it isnt a limitation of the hardware, merely the OS.

Disable power management

Hi,
I have an Arch install running no X. I want to disable the blank screen that turns on after 15 minutes of no keyboard interaction.
Can I just disable the power management module?
Thanks.

carlocci wrote:xset -dpms ?
You might also want to check for the Monitor section of the xorg.conf man page
Those work in X, but AP81 wasn't running X.
I have used "setterm" to change power managment settings. Maybe this will help: "setterm -powersave off"

Thinkpad L520 Power Management Issues

Hi all,
I have to report several issues with my Thinkpad (Core i5 2520M).
Both seem to be related to power management, that's why I decided to put them in one thread.
The problems occur on battery and with ac power connected, I have a 90 Watt power supply.
I am running Windows 7 x64 on my laptop, and I've applied all patches from Microsoft Update and Lenovo System Update.
All drivers are up to date. I am using the latest BIOS file (1.20).
The first problem is: My Thinkpad does not automatically increase CPU speed, it is always staying at 800 Mhz.
Even running Prime95 does not trigger some upscaling.
I experienced the same behaviour under Ubuntu 12.04 LTS, which I booted to check the problem.
In Windows, I set all power management options to full power (Windows Energy Control Panel and Lenovo Power Manager as well), still no change.
A complete BIOS reset (with removing the CMOS battery) did not change the situation.
The only workaround so far is, to run a software called "ThrottleStop", and to uncheck the box saying "BD PROCHOT". After doing so, the CPU is scaling up to 2.5 Ghz, but still does not enter Turbo mode.
The program has to be re-run after every boot to enable upscaling.
The second issue is:
I have bought a secondary hard drive bay, and the containing disk keeps spinning down after a few seconds of idle. (Yes, seconds!) The disk is working fine, does not have SMART errors and does not show this behaviour in another laptop and as an external USB drive.
I disabled all power savings options again (Window, Power Manager, and Disk AAPM), which could cause such behaviour, but still no luck. The first hard drive is an SSD, therefore I can't tell, if this drive is also affected by that behaviour.
UPDATE: After booting Ubuntu 12.04 LTS, I can verify that the behaviour is identical to Windows.
Since both of these problems seem to be related to some part of the power management, I am wondering if there is some bug in the BIOS itself or maybe some faulty system driver.
Any help on that would be appreciated, since normally working with the Thinkpad is rather annoying, considering the slow speed and the constant spin-up/down of the drive.
Best,
schalli

LennyL wrote:
Hi,
everybody suggests "hdparm -B 254 /dev/sdxxxx". This does NOT work. At all. The Load Cycle Count keeps going up. The 2nd HDD (in the CD/hdd caddy) powers down every few seconds, then up again.
I found this works: "hdparm -S 25 /dev/sdxxxxx" (change sdXXX in sda, sdb, or whatever relevant to your case). It sets spindown every 25*5 seconds. Second hdd is practically always on and LoadCycleCount remains constant.
I am also using "hdparam -S 0" to disable drive power management entirely.
LennyL wrote:
Please Please can you check something for me?
I have two hard drives (second is in aftermarket caddy), but it seems the second hd (the one in the caddy) is NOT seen by BIOS at boot. So I can only boot from the internal hdd. After booting, the second hdd is seen by Linux, SATA link reports 3Gb, no issues, all is fine.
Same here, the secondary hard drive is not seen in BIOS or in the BIOS boot menu.
After booting Windows/Linux, the drive works fine.
UPDATE: Even in good ol' DOS, the drive is seen. (I just booted DOS for a firmware update of an SSD drive, which was installed in the hard drive caddy.)
Where did you get the BIOS v1.32? The latest on the Lenovo Website and in System Update is 1.20..
Can you verify something for me too?
On my L520, Turbo Mode does not work at all, how about yours?
You can verify under Windows using hwinfo (http://www.hwinfo.com/ ).
For Linux, there's http://code.google.com/p/i7z/ , but you'll have to compile it.
Best regards,
schalli

Disabling "CPU Power Management" through BIOS -- any bad consequences?

Similar Messages

Maybe you are looking for