T440s Fan Control Issue

Hi,
The fan on my T440s will turn on when the CPU (i5 4300U) exceeds a certain temperature, around 50c. However once the fan starts turning, it will never stop turning regardless of the CPU temperature and utilisation. The CPU idles around 33c.
Any ideas?
Thanks

Hi den
One thing that changed in the new models is the HD sensor, on earlier models Apple had an external temp sensor +(pictured below)+ stuck on there HD's and in the latest models the sensor is built into the drive by the manufacture.
Earlier model HD sensor
I also think that because they are replacing so many without question, that they either have no clue or know there is a problem with some of the HD sensors, the SMC modules or cables.
Long shot, if the event in question is happening weekly on saturday morning +(by default the weekly maintenance script runs at 3am saturday or the next time the iMac is woke and available)+, you might try forcing the Weekly Maintenance Script using OnyX or the Terminal as a test to see if that sets it off.
http://www.titanium.free.fr/pgs/english/apps.html
http://www.thexlab.com/faqs/maintscripts.html
Dennis

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P45 Platinum fan control issue!

Ok i received a new MSI P45 Platinum board after my last one gave me nothing but problems and fried one of my Radeon Crossfire cards
Anyway the new one seems to be fine except one of my case fans seems sounds like it's spinning at full speed! I have case fans plugged into headers 1, 2 and 3 on the board and fans 1 and 2 can be controlled via the bios whilst fan 3 cannot! HWMonitor reports the correct fan speeds for 1 and 2 (running at 75%) and it tells me fan 3 is running at 50% but it's actually running faster and louder than the other 2!! With my old (faulty) P45 Platinum board the 3rd fan was quiet, but now it's very loud and i don't know why? I have the latest 1.6 bios installed as i did on my old board.
Can anyone explain what is happening? Cheers

I installed the latest MSI Dual Core center and now it's telling me system fan 2 RPM is too low! (keeps flashing)
CPU Fan = around 1700 rpm
SYS Fan 1 = around 1200 rpm (set to 75% in bios)
SYS Fan 2 = around 700 rpm (set to 75% in bios)
I'm not happy with this board... My last P45 Platinum had memory/CPU/PCI-E voltage issues but the fan speeds were perfect! And now this replacement motherboard has ok voltages but the fan speeds are screwed! Both boards are the same revision using the same bios and had the same system config.
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Overheating / Fan control issue on Gt735 / Ms-1721 in Vista/Windows 7

Dear all,
I have a 2 month old MSI GT735 /Ms-1721 running windows 7.
Whatever the modus eco/turbo i am in, whatever it is i am doing office applications or gaming, the system will not regulate my fan speeds and therefore the system overheats measuring up to 97 degrees Celsius (hwmonitor.exe).
The fan stays at the normal speed (guessing around of 30% of what it is capable of), there is barely any airflow coming out of the air slots where the fan is located.
This problem is present with windows vista and windows 7.
I tried SCM , core centre, speedfan and a few other applications, none of them can regulate the fan speed.
The bios (latest version according to live update and the HQ Forum flash utility) doesn't show any options either.
I had the issue with windows vista and windows 7 alike.
All the parts in the laptop are original, it has not been overclocked. The different windows powe modus energy saver, balanced, high performance do not make a difference.
How can i regulate the fan speed on this laptop?
Property Value
Model MS-1721 / GT735
CPU Name AMD Turion(tm) X2 Ultra Dual-Core Mobile ZM-82
Memory 4096 MBytes
Bios: GT735, BIOS Version: A1721AMS Ver1.0O
------------

Quote from: _deepfire on 29-January-10, 08:55:02
Unfortunately, it appears that I'm not as lucky as haraldstoll is.
I had 1.0P version flashed and the fan was slow, which resulted to 90%-time-slow/10%-time-fast FPS in CPU-intensive games.
Then I flashed 1.0U (using the MSIHQ utility) and apparently the system stopped clocking down the CPU, as it started shutting down due to overheat.
From bad to worse.
This is Windows 7 on MSI GT 735.
Why isn't there an utility to control fan speed manually? Would've helped the unlucky ones among us immensely...
I would recomand you DO NOT UPDATE TO A1721AMS V1.0V. I did that because the msi service told me it would fix all my problems. Yes the fan work BUT THE TEMP. of the cpu is wrong. I did i clean instal because i thought some programs could fail buy no. After the clean instal everest and speedfan told me my notebook is 90 degree idle. I can feel that it is not more then 40-50 but when i go to youtube it will go to 115 degree and the cpu wil lock itself for a minute. -.- this sucks. Already told them this and i hope they will tell me what to do because this is sick.
EDIT: i'm on a legit windows 7 ultimate 64bit.

Re: MSI G43-Z97 - fan control issue + BIOS

Well,
this is not a helpful answer and more like "don't care".
This doesn't to be normal or wanted I think, when I didn't had this issues with the Z77A-G43 (which I think is a previous version of the MB). Also I cannot change the Fanspeed in Speedfan l...

Quote from: hideki_nagunama on Yesterday at 23:54:34I just wasn't at home while I wrote the last message.
And now when you are finally home, what was the BIOS version?

K8N Neo4 Platinum - Fan control missing?

Good evening.
I've recently assembled an Athlon 64 3000 (Venice) / Neo4 Platinum system, and unfortunatly I am not able to control the speed of any fan connected to the motherboard. Also disappointing is the fact that four fans are connected, but only three show in Speedfan.
My CPU cooler is Thermaltake's Venus 12, so it's not MB-controlable.
My Enermax 120mm fan connects using the usual 3-wire connection, and has an RPM knob integrated. It doesn't seem to respond to Speedfan no matter what the state of the knob is.
Last but not least is the noisy chipset fan, which shows but also doesn't respond to Speedfan.
There's also a 92mm Enermax fan which is connected the same way as the 120mm one, but doesn't show.
I've only found two BIOS settings that were said to be relevant - Cool'n'Quiet and CPU Fan Target. Both had no effect. I did no find a NB Fan Target setting that some people reported having.
CoreCenter seems uselss. It doesn't change anything regarding the chipset fan, and I didn't find any "Temp Alarm" setting for the chipset, that was also mentioned here at some time. Tried uninstalling it as well (probably with a restart, I don't remember), but it doesn't seem to have had an impact on the fan control issue.
So essentialy, what I've got are four fans connected, three of those showing, two of these that can theoretically be adjusted through software, one that's too damn noisy at more than 7500 RPM, and zero that I can actually through software.
And no, a Zalman Fanmate is not a solution after I've invested in this top-of-the-line MB. I expect to get what I've paid for.
Is there a solution to this problem, once and for all?

To get to the CoreCenter Temp alarms, you have to expand the right 'wing' (click little arrow); but this only sets temperature below which an alarm will sound: it has no effect on fan speed itself.
But indeed, nothing on CoreCenter seems to affect NB fan.
The manual itself only mentions that CPUFAN1 supports fan control.
[Will eventually apply myself hardware solution for nb fan, either single resistor, as described elsewhere on this board, or with rheostat; if i can find a store where to buy fanmate2, that would be better (shipping/handling from net order would cost more than the darn thing!).]
@Flow: my case fan, connected to SFAN1, does show in Speedfan, even without CoreCenter lauchned (I removed it from StarUp list).
(However, i still have the AMD PowerNow! Technology Service, ie GemServ, enabled and started)

Fan Controlling Software Issues with K8N-Neo4-F

My mobo is a K8N Neo4-F 3.0.
1. Is there anyway to control the Northbridge and System fan using Speedfan? I searched so far without any solutions.
2. I tried MSI Corecenter for a while (the last version), and it triggers the alarms and atempts to shut down the system without any visible reason everytime the PC comes backs from hibernation. I have the latest BIOS and latest drivers on my PC. What could be wrong?

It could be the sensor is bad on the system fan or the header itself. Is it possible for the wire from the NBFAN1 to reach the CPUFAN1 and the wire from the CPUFAN1 to reach the NBFAN1? That way we could test to see if it's the fan or MOBO header? I'm not sure this is possible, but it occurred to me as a test. According to the manual, both headers have the same configuration and 12V feed. I think the amp specs are the same for both headers(someone that is better with electronics should speak up here). Make sure you have the CPU fan set to 100% or whatever as I'm not sure if the NB fan can or should be speed adjusted.
According to page 2-16 of your manual, it only mentions control of the CPUFAN1 header:
Quote
Fan Power Connectors: CPUFAN1 / SFAN1 / SFAN2 / NBFAN1
The CPUFAN1 (processor fan), SFAN1 (system fan 1), SFAN2 (system fan 2) and
NBFAN1 (NorthBridge Chipset fan) support system cooling fan with +12V. It supports
three-pin head connector. When connecting the wire to the connectors, always take
note that the red wire is the positive and should be connected to the +12V, the black
wire is Ground and should be connected to GND. If the mainboard has a System
Hardware Monitor chipset on-board, you must use a specially designed fan with
speed sensor to take advantage of the CPU fan control.
MSI Reminds You...
1. Always consult the vendors for proper CPU cooling fan.
2. CPUFAN1 supports fan control. You can install Core Center utility
that will automatically control the CPU fan speed according to
the actual CPU temperature.
3. Please refer to the recommended CPU fans at AMD® official
website.
But, In addition to finding out about this issue, I can't stress enough about getting a better PSU.

Z77A-GD65 + MSI Control Center (version 2.5.053) = FAN speed control issue

OK,
I've got Z77A-GD65 board and I am using MSI Control Center (version 2.5.053). I have one fan connected to CPU fan header and another fan connected to System Fan1 header on the motherboard. The problem is that while trying to use Smart fan control in MSI Control Center (under Green Power tab) only CPU fan changes speed according to load and the one connected to System Fan1 always stays at the same "System Fan1 Min" set speed. In BIOS the system fan1 is set to auto as all other options are constant speed from 50% to 100%, both fans have 4 wires, so they can change speed. I want both fans to change speed according to CPU load. I know I can use Y (split) cable to connect both fans to the same CPU fan header but I would like to avoid this if possible.
Anybody experiencing the same thing? Issue with bios? Control center bug?

As long as the amps of the two fans doesn't exceed the limit for the CPU fan header, go ahead and use a splitter. Not positive, but believe the fan header amp limit is 1A?

In my macbook pro 15 inch mid 2012 model, my cpu and gpu will get very hot, when gaming or rendering sometimes over 200F. The fans only spin at max about 2900 rpm, when their max is 6400. I downloaded a fan control app, but how can i fix it?

In my macbook pro 15 inch mid 2012 model, my cpu and gpu will get very hot, when gaming or rendering sometimes over 200F. The fans only spin at max about 2900 rpm, when their max is 6400. I downloaded a fan control app, but how can i fix it?

Hi rhaughan,
I see that you have concerns about your operating temperature of your computer while using resource-heavy applications such as gaming applications. I have an article that will address some of the concerns you have mentioned:
Mac notebooks: Operating temperature - Apple Support
http://support.apple.com/en-is/HT201640
While there are third-party utilities that measure the temperature of a notebook computer, it is important to understand that these utilities are not measuring the external case temperature. The actual case temperature is much lower. Never use third-party applications to diagnose possible hardware issues—instead, contact Apple or go to an Apple Retail Store or Apple Authorized Service Provider.
You should also see this article for even further information about your fans:
Learn about the fans in your Mac - Apple Support
http://support.apple.com/en-is/HT202179
Thanks for being a part of the Apple Support Communities!
Cheers,
Braden

User-developed Fan Control for the S10(e)

Hello and welcome.
When you've searched the internet and found this thread, it's possible that you are an owner of a Lenovo Ideapad S10 or S10e which has a little problem with the behaviour and/or the noise of the fan. In this post you will get all the informations you need to handle this problem for yourself. It should also be the same on every S9/S9e.
Just a few comments before we begin:
This is not an official support or solution by Lenovo.
We are just normal users as you are, but we get rid of the fan and wanted to find a way to handle it. So if you want to try anything of the methods described here you have to know that you'll do all this only at your own risk. We are not responsible for any damages of your device. You should only use these methods if you know what you are doing.
Please note that this thread is only for discussing, improving, trouble shooting and perhaps extending the fan control utilities. Any general complaints about the fan problem itself should be placed in the original thread right here: http://forums.lenovo.com/lnv/board/message?board.id=IdeaPad_Netbook&thread.id=795. It already has 80+ pages (the link goes to the first page) and it is better to exclude all the fan control stuff because there it's very difficult to keep an overview.
Here you may post all of your questions, ideas/brainstorming, concerns, thanks and so on and you are really invited to participate and be an active member.
In this first part of this post I'm going to summarize all information about using a fan control utility. For any newbie it will be enough to read this post to get all necessary information. The second part does the same for developement of fan control utilities as we still have no known or working fan control utility for Linux, Mac OS X and other OSs I've forgotten - for now.
For getting started you need a S10 or S10e with an up-to-date BIOS. For the S10 it's the 90 67, for the S10e the 66.
The battery issue
Under very specific circumstances - that we haven't figured out yet - it might happen that your Lenovo S9/10(e) no longer detects the battery while using S10FanControl or S10Fan. It might occur after 2 minutes, it might occur after 2 months, it might never occur. It does not occur using Notebook Hardware Control.
It can be solved by removing the battery, waiting 10 seconds and put it back in. Then the battery is re-initialized and the detection works again.
S10FanControl - Windows
The first utility is S10FanControl created by user dresslerc. The current version is 1.0.0.1, available here: http://www.mediafire.com/file/yd5xmnrnijf/S10FanCtrl1.0.0.1.zip. After you've downloaded it you just have to extract it and start the .EXE in the "Release" folder. Here are the notes and the description dresslerc posted right here:
Everyone,
I've uploaded a version which everyone can use to test with. Remember this is still a TEST version although I think it works for the most part. It should work both on the S10/S10e.
Please install the .NET Framework 2.0 or later first.
Then click here to download the exe: http://www.mediafire.com/?jlg2enkjdxn
Once downloaded, extract the files and hit hte S10FanCtrl.Exe. Once this program launches you should be able to control the fan. Keep in mind that if you lower the fan speed then it'll take upto 30 seconds before the S10 registers the change, so be patient.
I've only tested this on the latest BIOS 59. I am sure it will work on the 57 as well but the individual speeds might not work properly on that version. Please try it out and report back.
The only issue that I heard so far is that occasionally the fan will kick in regardless if in Manual/Smart Mode. Also the temp it shows may not be accurate. If you find any other issues please let me know what they are so I can attempt to fix them.
Once we have all the kinks worked out then I will release the source.
Heres a quick Video: http://www.youtube.com/watch?v=_PKl70ZgmFg
REMEMBER: USE PROGRAM AT YOUR OWN RISK!!! I AM NOT RESPONSIBLE FOR ANY DAMAGES THIS PROGRAM MIGHT CAUSE.
Application Use:
BIOS Controlled - Fan is controlled by the BIOS
Smart Mode - Fan is controlled based on the conifguration in the options. You can set the threshold here at what temp you want the fan to kick in...
Manual - Fan is controlled manually by the slider.
If you want to have the program startup automatically, then place a shortcut of the app in the PROGRAM FILES -> STARTUP folder. Then you may want to go to the options and make the application minimize at startup.
Edit:
It seems there are some issues with the app and the S10e or previous BIOS versions. Will post a fix asap.
The source code for S10FanControl is available here: http://www.mediafire.com/?sharekey=7a3fb99d33817c08c2b435915e8821d7e04e75f6e8ebb871, written in Visual Basic .NET 2008.
S10Fan - Windows
The second utility is a tool written by user slash:
Hi guys,
Well it looks like Lenovo dropped this matter after all. Anyway, I have here another fan controller to add to the bunch. I have been using it for some time now without any problems. It is for both S10 and S10e.
What the program does is basically the same as others. The S10's fan speed is controlled according to the ACPI thermal zone temperature. By over writing the values which resides at offset 50h of the EC register at an appropriate timing, the ACPI thermal zone temperature is over ridden. The program is written in C and uses WinIo created by Sysinternals. The GUI version is available now.
It should be noted that the fan speed temperature thresholds differs with BIOS version. For 14CN67WW and 14CW90WW the fan changes speed at temperatures 60c, 65c, 70c, and 80c. Furthermore, the BIOS will automatically shutdown the S10 if the temperature reaches 90c.
The program has a fail safe mechanism that automatically disables itself if the actual ACPI thermal zone temperature goes above 85c. This allows the BIOS to regain control and the fan will work as intended by Lenovo. If the temperature drops below 85c the program will take over control again.
To run the program, you will need administrative privileges.
Known working BIOS versions: 14cn58ww, 14cn60ww, 14cn67ww, 14cn90ww
The program will work with any BIOS version as long as the BIOS uses the 50h EC register readouts to control the fan.
build 2009.05.24
Higher priorities for EC commands.
Usage: The program will run in the system tray. Double click or right click and use the menu to open the program. To determine the BIOS temperature thresholds, use the 'Setup' button. To run at boot time, place a short cut in the startup folder.
http://www.mediafire.com/file/njhz0icym2t/S10Fan.zip build 2009.05.23
Usage: S10Fan.exe
Added GUI.
build 2009.05.17
Usage: S10Fan.exe 60 65 70 80 70 75 80 85
S10Fan.exe test
The first 4 values are the BIOS temperature thresholds, the latter 4 are new thresholds that we want to over ride with. To determine the BIOS temperature thresholds, use the 'test' option.
build 2009.03.16
Usage: S10Fan.exe 70 75 80 85
-Slash
For updates and newer releases please check slash's post: http://forums.lenovo.com/lnv/board/message?board.id=IdeaPad_Netbook&view=by_date_ascending&message.i...
Notebook Hardware Control - Windows
The third utility is a profile for Notebook Hardware Control. I've adapted it from a profile for the Lenovo N500 which I've found here: http://nhc.yourcopy.de/overview/. With the manual for creating the profiles that can be found here: http://www.notebook-treff.de/board/database/hilfsprogramme-f%C3%BCr-nhc/92-how-to-create-an-acpi-fil... I was able to change the ACPI commands to work on the S10(e).
Installation and setup is divided in two steps. The program Notebook Hardware Control (NHC) is available at http://www.pbus-167.com/. Install the program, but do not start it for now. Then you need my NHCConfig utility, available here: http://forum.eeepcnews.de/download/file.php?id=1476. It detects your model number and BIOS-version via WMI and writes a proper S10(e) profile to the NHC acpi directory. The GUI is German if you have a German Windows and English if not. Additional languages can be added.
After you've extracted the ZIP-file you have to start the nhcc.exe (requires .NET Framework 2.0). At first a message appears that you use the program at your own risk. Then you can choose if you want to apply your own settings (experts) or if you just want the program to run with my defaults (newbies). In the settings window you can see your system details on the left, you can set up your thresholds in the middle and you can set the fan speed you want on the right. Then click on execute.
Now start NHC. Go to the "Settings" tab and click on "Show all NHC options and settings". Then a few more tabs appear. Go to the "ACPI" tab and check if the "ACPI Control System" is running (if everything works, the message "ACPI Control System running" will appear, otherwise it says "ACPI control system is not yet configured for this system"). Now click on "Show ACPI Control System details".
Here you can change the temperature values the fan control depends on (the settings from NHCC are the default values). On the bottom of the window you can see the "Current CPU temperature". That is the value you have to deal with. In general it has a value of around 60°C. In the middle you can see four user editable temperature values. You can leave the values as they are if everything works. The on/off values are responsible for the temperatures at which the fan starts running and stops again after cooling the device. The level values are responsible for the fan speed, for example you can set the off_level higher to let the fan run all the time at the lowest level, if the values do not fit for your device or whatever.
You can switch between NHC and BIOS control by disabling or enabling the "ACPI Control System" or by closing NHC.
Q:
A:
With every utility it is possible that it takes some time until you see an effect after you've started the program. Any failure of the programs should be no big problem because the only thing that should happen is that the BIOS controls the fan. Another issue that might occur due to the way the fan is controlled is that the fan may start running for a very short time and it looks like the fan control has lost control. The fan should stop immediately or at least after a few seconds.
Keep in mind that running the S10(e) with a fan control means that the S10(e) has to deal with higher temperatures. That could mean that the device will not last for 10 years but only 9 years (who uses a netbook so long...?). In every case you need a tool for monitoring your cpu temperature. We know that especially Core Temp 0.99.5 and Real Temp 3.00 do a very good job. That is important because the temperature values you need to set up the fan control are different from the values reported by the cpu sensor, they are between 15°C and 20°C higher. A normal temperature reported by the monitoring should be around 40°C, with the NHC default values the fan starts running at 52°C and stops at 38°C.
Q:
A:
Q:
A:
END using fan control
BEGINNING developing fan control
Controlling the S10(e)'s fan is a litte bit difficult because it looks like there is no way to control it directly. But it is possible to manipulate the temperature the BIOS fan control depends on. As long as the built-in fan control thinks that the cpu is cool enough the fan stays off. And that is exactly the point where we can attack.
The fan control depends on a field called RTMP in the memory of the embedded controller. It can be accessed via "_SB.PCI0.LPCB.EC0.ERAM", the offset of RTMP is 0x50 (hex) or 80 (dec). It is a direct I/O read/write. The complete NHC command for reading the value is: ACPI.FIELD.ReadByOffset("_SB.PCI0.LPCB.EC0.ERAM", ref value, 0x50, 8) with "value" as the variable which gets the value.
What program logic do you need? You need a timer or something else that conducts an always-refresh cycle. It sounds very easy: You read the value, manipulate it and write it back. And it is that easy, you just have to keep some things in mind.
This refresh has to be done very often. The procedure must be very thin and quick. Also the bus that is used to communicate with the EC is a problem, but since the S10e BIOS 66 it became a minor problem for me because it looks like the built-in fan control now depends on some kind of average value over the last few seconds and it doesn't really matter if one write-cycle is failing.
The read-event must be placed before the write-event. Otherwise you just read your manipulated value. The field is filled by the system regularly, so you just have to test if the read_value is different from the written_value, then you know that the field was filled with a "fresh" value. Like "if read_temperatue <> written_temperature then real_cpu_temperature = read_temperature else do nothing".
About the values you have to write back... you will have to test and play a bit. My experience is that you can select three fan levels, starting at 59°, 62° and 70° - at least with the NHC profile and my S10e it's like that. It's some trial 'n' error. My fan stays off at < 59°, but you should select a very low value for fan_off like 30°. In my opinion it switches off much faster the lower the written value is. But it's just a feeling, I haven't measured it.
Q:
A:
Q:
A:
Perhaps some users from countries with other languages than German and English can add tags for "fan", "control" and "noise".
Note from Moderator: Minor edits in title and disclaimer.
Message Edited by JaneL on 04-25-2009 02:32 PM

Great opening post Carsten!
The latest bios:
http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=MIGR-71252 (BIOS 66)
The FSB can be reduced from 133MHz to 100MHz using SetFSB, this also reduces the heat:
http://www13.plala.or.jp/setfsb/
clockgen = SLG8SP513V
If you add a shortcut to the startup folder the program will start at startup. Under properties you can change the target to:
"C:\Program Files\SetFSB\setfsb.exe" -s100 -b1 -cg[SLG8SP513V] -w20
So it starts with a FSB of 100Mhz, in the background, with the right clock generator, after 20 seconds.
Message Edited by quazar on 04-25-2009 05:07 AM

Proper Fan-Control by Lenovo?

Hello Everyone,
two weeks have passed since i got my Thinkpad L530 and for the most part i am happy with it. But there is one issue which gets on my nerves:
- the absolute annoying pulsing of the fan !!!
For me one of the most important reasons to buy this laptop were the good test-results about noise-emission and battery-duration, because i use this laptop for work. Therefore annoying fan-sounds are unacceptable.
To solve this issue i have comb through serveral forum-threads and finally found a solution for my Win7-OS with TPFanControl. But i also use Xubuntu and on linux there are currently no working fan-applications for the SL- / L- and some E-Series
What i have read about i'm not the only one with that problem and that issue seems known for ages....so my question is:
- WHY do we still have to use third-party programs to get this problem solved, with the risk of breaking our hardware? Is it that hard for lenovo to offer a proper fan-control for their devices?
Greetings, Christian W.

ArchSoarer: thanks. This thread is almost a zombie, but I have tried your "acpi_osi=Linux" boot command. It does make the fan operate correctly EXCEPT where one suspends or hibernates, in which case I still get fan problems. I have outlined the situation here on our wiki: http://wiki.archlinux.org/index.php/Tos … llite_L300 and have a link there to an attempt to fix the issue by disassembling the DSDT. I have yet to go any further and attempt to fix the DSDT errors in this laptop. For the moment, because Arch boot quite quickly I simply do not use hibernate or suspend on that laptop.

Fan control in notebooks

Hi all,
I am using Arch Linux since a few months, right after purchasing my new laptop, a Dell Precision M3800. Anyway I am a linux user since many years. I like very much the control that arch give to the user in terms of configuration possibility. My question is relate to fan control in notebooks. Even though I noticed this issue in my laptop now, I think similar observation holds also for other notebooks and linux distros. For fan control I use the fancontrol utility. Once properly configured, there is a min temperature value below which the cpu fan is off (default is 20 °C, I increased up to 45 °C) and a max temperature value (default is 55 °C and I placed 65 °C) above which the fan is running at full speed. The reason for the temperature limit changes is to emulate windows behavior in terms of noise and thermal handling. With a room temperature in the order of 25 °C, I get right after login a cpu temperature of about 35 °C. Then the temperature increases even in idle conditions up to the limit of 45 °C and then it is stabilized by the cpu fan. Chaning the temperature between 35 °C and 45 °C simply changes the time interval I have to wait until the cpu fan switches on and cpu temperature stabilizes with low load. The point is the the stable thermal situation produces a continuous switching of the fan state, let's say the fan is on for a few seconds every minute. The reason is that the fan switches off right after the cpu temperature falls below the value for which it turns on. Wouldn't be better to define two different temperatures for switching on and off? Let's say, fan on when temperature reaches 45 °C and off when it falls below 40 °C. Is there a way to do that with fancontrol or same other tool?
Thank you in advance.
Bye,
Luca

OP, what you're describing is called (at least in HVAC circles) hysteresis. You may be able to find some fan control scripts that support it (googling fan control + hysteresis), or just write one yourself. You can also control this behavior to some extent by adjusting fancontrol's polling behavior (the "INTERVAL" setting), but that has risks.
I think implementing hysteresis is not a particularly useful endeavor because PC temperatures can change 30 degrees or more in a few seconds when under load, which is completely unlike, say, a home thermostat where temp changes are much more gradual over time. Realistically, you should expect to always be running at least the CPU fan at some speed, and set your "turn off" temperature for it to room temperature. You can set different temperature set points for different fans, so you can have the CPU fan turning off at a lower temp, but have other fans off until the temp gets much higher.
Last edited by mwillems (2015-05-31 16:35:48)

[Solved] Overheating/fan/sensors issues after kernel updates

Hi all,
I realise there has been a bit of correspondence on this already. I'm after some advice for my specific situation:
1. My laptop is an acer aspire 5315. I has well understood overheating issues that arrise due to BIOS problems
2. Fan control and temperature reporting worked perfectly with kernel 2.6.30, stopped working with 2.6.31 - I assume due to the well documented changes made in that release. The temperature only seems to be read once - at boot. sensors never reports a change after that; if the temperature is cold at boot the fan never get switched on. Unfortunately this happens most often.
3. I tried setting the recommended kernel option (can't relocate the post now). It didn't help :-?
4. I have tried upgrading the BIOS but the distribution from acer is a windows executable (won't run under freeDOS) and I do not have windows installed on this PC (not game to try under wine).
5. I re-installed the old kernel from my pacman cache only to find that my wireless no longer works (fan works just fine though).
I'm now totally stumped :-/
I'd like to update my bios and go with the latest kernel but can't see a way without installing windows.
This might be fixed in an ubuntu kernel release (https://bugs.launchpad.net/ubuntu/+sour … bug/453700) but I'd prefer not to do that switch... perhaps the same fix is coming to arch?
I'd accept having to pin the kernel to an earlier version but neet to get the wireless working.
help...
edit:
I've now managed to get the kernel backdated correctly (so that wireless works as well as the fan) by re-installing the kernel and firmware together.
Have configured pacman to igmore future kernel updates
If anyone has any suggestions on howto update my bios I'd be very greatful.
Last edited by drandre (2009-11-06 13:26:46)

Hi,
Got exactly the same issue, after running for a while laptop justs goes off... going to try to regress kernel until issue is resolved
BIOS update does sound a bit extreme
MrG

No fans working withouth Lubbo's fan control

Hi.
I recently installed on a Boot Camp Partition, Windows 7.
I installed correctly all the drivers using my iMac installation CD, in windows. However i can't get the fans working, if i don't use Lubbo's Fan Control software: this is the only way to get them working.
But this software if for the macbooks, so i can't get the fans work properly.
My iMac is a 2011 model, if you need to know
Can someone help, getting my fans working correctly on Boot Camp?
Thanks to everyone.

Apple has a big weakness and this has always been an issue.
I used InputRemapper for years also.
Windows on Mac is less than 100%, enough so that while I still (right now) running 7 on Mac Pro, I ended up building a couple PCs too.
For a long time - over a year - my hope was to get SpeedFan to work, but that never happened.

Fan control questions

Hi
I have a mid 2008 2.8Ghz iMac with the stock 320 Gb HD and 4 Gb ram. It runs fine but I am worried about how hot the case gets at times, in particular the top left corner. I have iStat widget installed too which shows what I think are reasonable temps most of the time, but sometimes even after just everyday use (browsing etc...) some of the temps seem high (power supply is presently at 75c). The fan speeds don't seem to increase much at all from the factory minimums. I know about smc fan control and iMac fan control, but I have a couple of questions before I decide to use them.
1. Do you think I need to be worried about this?
2. What damage could I cause by running the fans harder?
3. If I use these utilities to push the fans harder than Apple recommends, will I void my Apple Care?
Looking forward to your answers
Paul

An utility like smcFanControl only changes the minimum fan speed setting. You are still running the fans well below its maximum capability. So the change is to the low end of the speed range, not the high end. You CAN set it high enough so that the minimum fan speed sounds like a small vacuum cleaner, but I would not set it that way for any length of time. I just tried it once to see what it sounded like with the fans running at a high speed (never heard them before). There is a max possible setting, so you can't set it to a crazy high number.
I use smcFanControl and have the fans set about 25% higher than the default speed. I still can't even hear them at that setting, so I figured I wasn't doing any harm and it may help my iMac run cooler (not that noticed any issues with heat).
I can't see how it would void AppleCare. Unless you set it to sound like a vacuum cleaner all the time (which would be really annoying), you are running the fans well within their normal operating range.
Note: The adjusted minimum fan speed is only in effect while smcFanControl is running in the background. It does not change any system or hardware settings. To go back to the default settings, just quit smcFanControl.

Fan control and PEACE

Hello, i recently erased by mistake tow folders from the startup items, fan control daemon and PEACE, i got the folders back but when the mac starts up i get this window telling me that there's a problem with those folders, how can i solve this?

If the SMC reset does not help, install istat menus:
http://bjango.com/mac/istatmenus/
Run an Apple hardware Test:
http://support.apple.com/kb/ht1509
When your MBP gets hot, post results.
I suspect your MBP has a faulty fan, among other issue(s).
Ciao.

T440s Fan Control Issue

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