Fans doesn't stop ??

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Angel · #1 Post by **Angel** » Mon Oct 04, 2004 10:41 am

Hi !

I have installled mobilemeter to check my laptop cpu and system temperature. After the system temperature goes up to 40 degrees
the fans start to spin, I would think that after the system temperature get colder the fans should stop but it isn't so Confused
Is there someone around that could tell me his/her opinion about this issue, is there a way to fix that ??

Regards

atlacatl · #2 Post by **atlacatl** » Mon Oct 04, 2004 1:08 pm

In my t40p, once the fan starts, it never stops...

KillaByte · #3 Post by **KillaByte** » Tue Oct 05, 2004 7:19 am

Same thing here (T42p - 2373-HTG). The problem seems to be that the on/off thresholds are not necessarily the same. It may be the case that the fan starts spinning when the temperature reaches 40 °C but only stops if the temperature drops to 35 °C for example. On my machine the temperature never drops below 37 °C which may be the cause for the observed behaviour.

nikemen · #4 Post by **nikemen** » Tue Oct 05, 2004 10:38 am

Is there a way to force a shutdown.
when I first got my T41, i noticed the fan was never on. So quite, so nice. Now, when on AC, I have HIGH CPU enabled, so I can imagine it is on sometimes. But, it really is ALWAYS on, from startup in the morning to shutdown at night. Sometimes it does go into high speed mode, for a few minutes or so, but at least it is also on.

I would love to shut it down a bit, sometimes just sometimes

why would it be on all the time now, since getting it new? Is it because there is so much stuff now on the drive?

Angel · #5 Post by **Angel** » Wed Oct 06, 2004 3:50 am

Well I phoned to an IBM service point and according the guy my problem could be resolved by changing the fan. I would take the risk to change it myself as I am not ready to pay 140 $ per hours to IBM just to change a fan ( yeah my thinkpad has no warranty anymore)

What do you think ? Changing the fan might be the answer??

Regards

zottel · #6 Post by **zottel** » Wed Oct 06, 2004 8:47 am

uh what model thinkpad do you have? i had a t41p for almost two weeks (had i kept it any longer i wouldn't have been able to return it anymore). afaik the permanently running fan is a common problem of all t4*/r5* series thinkpads. the t*p models (like the one i had) have a larger, quieter fan that also cools the gpu (as opposed to the non-"p" models only cooling the cpu), but that does not mean the fan will shut down once it started. it's a problem with ibm setting the turnoff-threshold way too low, and they refuse to change it. i called ibm support and they told me it was a feature, not a problem. i searched the net for days, trying pretty much everything suggested to get the fan to turn off. some people even underclock their gpus so much that they have to run 16bit color because it couldn't handle 32bit anymore. at the end i got the fan to turn off for about a minute every 15 minutes, but only with the computer doing absolutely nothing. that's not good enough; if ibm can't be bothered to at least make an option ("i wan't a cool comptuer" / "i wan't a quiet computer") in the bios or something like that, i'm certainly not paying them >2000 euros for a machine that is intentionally crippeled (and yeah, i'm extremely sensitive to background noises). so in summary, if you wan't a computer that can do normal non-cpuintensive tasks without constantly having a fan running you need to get either an x-series thinkpad or a non-ibm laptop. samsung for example builds quiet computers; they once did a bios update for one of their laptops (x10 i think) that caused the fan to run constantly when on ac power. users complained and in a matter of days samsung provided a new bios that fixed that fan-issue. i wish ibm were as customes-friendly as that, it's really a pity because apart from the fan problems the t41p would have been perfect for me.

spirifer · #7 Post by **spirifer** » Wed Oct 06, 2004 10:27 am

I change the fan of my T41 (radeon 7500) with the T41p fan and the fan is always on.... the contact between the GPU and the fan is not good, i try to put a thin layer of copper but the fan is always on....
The culprit is the GPU.
I put an external fan (Thermaltake) 80 mm USB (5V), underclock the GPU (69 mhz gpu and memory) and the fan (original fan) is always off

pictures and video:
http://forum.tt-hardware.com/ultimatebb ... 12978&p=11

primedude · #8 Post by **primedude** » Wed Oct 06, 2004 11:44 am

Obviously some people are deeply bothered by the noise of a fan, and i don't mean to belittle that, but where exactly do you work that you can hear it? In my office, at home, in common areas, in airplane cabins, I can never, ever hear my fan sitting at a normal distance from the laptop. The only exception to that is if I'm at home, without an air conditioner running, and I'm playing a game that causes the fan to run at high speeds. Otherwise, I can't hear the fan at all from more than six inches away.

Angel · #9 Post by **Angel** » Wed Oct 06, 2004 3:19 pm

Primedude you're lucky I wish I could not hear my fan

but that's just a dream... As it has already been mentioned somewhere in this forum the fan seems to start not cause of the cpu heating but more likely cause of the increase within the system ( inside the case ?) I installed mobilemeter and did some intensive cpu tasks, after getting a cpu temperature above 60 degrees and a system temperature around 37 degrees the fan was still quiet.After the system temperature is above 39 degrees the fan starts spinning

Regards

Angel · #10 Post by **Angel** » Thu Oct 07, 2004 5:34 am

Today I brought my laptop outside to check if the fan would stop when the case and the cpu are exposed to colder environment than my room. What happened is exactly what I thought; the fan doesn’t stop once it started even when the case and the cpu temperatures have decreased. Then when I put the laptop on standby mode and restart it again the fan this time is not spinning! Only it will start when again the case temperature is reaching 39 degrees. So I don’t exactly if this problem is related to the BIOS, which is unable to order to the fan to slowdown when the system and cpu temperature get down. I did upgrade with the latest BIOS available but it doesn’t help.

Does someone know what could be the problem??

zottel · #11 Post by **zottel** » Thu Oct 07, 2004 8:13 am

spirifer: you're one of those underclocking people i was referring to ;-) it's really amazing what people will do to get a little silence... but to me drastically underclocking the gpu wasn't an option, and having an external fan running to get the internal one to turn off even less... it kind of defeats the purpose of having a very portable and powerful laptop in the first place.

primedude: i work at home. in this part of the world it's not ususal for people to have aircon for their homes (and not necessary either). when sitting at a normal working distance from the laptop i could clearly hear the fan running (when the harddisk was off that is... that 7200rpm hdd is way too loud and would have been the first thing to get replaced had i kept the thinkpad). don't get me wrong, the t41p fan is the quietest laptop fan i have heard yet, but if i can hear it it's going to distract me. plus, i know that it doesn't need to run (it's blowing ambient-temperature air).

angel: the problem is that ibm wants the fan to turn on when the laptop temperature (as reported by acpi) is more than 39 degrees celsius and go off again once it's become cooler than 35 degrees. unfortunately, even when doing absolutely nothing, the temperatures hardly ever go as low as that. when you put your computer to sleep, it will turn off the fan, and only turn it on again once it's back at 39 degrees. as i said, ibm doesn't consider this a problem and i don't think they will change those values, not even as an option to choose between a cool/quiet computer.

Angel · #12 Post by **Angel** » Thu Oct 07, 2004 11:37 am

Zottel you said that the fan will "go off again once it's become cooler than 35 degrees". Today the laptop temperature was at 35 degrees celsius, I might try tomorrow again to see if I can get a temperature lower than 35 degrees. Let's see if the fan stops

cakos · #13 Post by **cakos** » Fri Oct 08, 2004 3:48 am

mmm
I tried a funny experience...I put my T42p in the freezer for a while to see if the fan would go off...even at 33°C (couldnot go lower) the fan was on.

meditate2001 · #14 Post by **meditate2001** » Fri Oct 08, 2004 6:40 am

DAAAMN ! Same problem with my new T42 / FVU. That really pisses me off...I have the latest Bios. Some of you with older bios without this problem ???

cakos · #15 Post by **cakos** » Fri Oct 08, 2004 6:55 am

but you know it is not a problem the fan noise is really really low...
When it is high, it mean I am playing SW battlefront, but blasters sounds cover its noise...

sugo · #16 Post by **sugo** » Fri Oct 08, 2004 7:01 am

Hey cakos, I am curious if your japanese T42 is made is Japan or China?

cakos · #17 Post by **cakos** » Fri Oct 08, 2004 1:11 pm

err.my T42p is a french T42p..made in china.
why did u say it's japanese?

meditate2001 · #18 Post by **meditate2001** » Sun Oct 10, 2004 9:18 am

If i use speedswitch to clock down the cpu to 600mhz, with mobmeter i see that my system temperature drops from 49 celsius to 39 celsius ! and now out of the fan cames only little warm air. BUT why is it still spinning ??? is there t42 where the fan stops ????

Angel · #19 Post by **Angel** » Thu Oct 14, 2004 8:12 am

Meditate2001 how do you use speedswitch to clock down the cpu to 600mhz ?

meditate2001 · #20 Post by **meditate2001** » Fri Oct 15, 2004 3:35 am

right click on the tray symbol and than max battery...

Fans doesn't stop ??

Fans doesn't stop ??

force shutdown

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