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13 Posts

12-07-2011

michigan

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Re: Fan never stops DSDT / BIOS hacking thread

2011-12-20, 13:44 PM

wrote:
hi smaaz.

please, note that flashing un-official bios update will void your warranty. if you break your mainboard, warranty won't cover the replacement.


What does the warranty cover?  Does it cover the fan working properly?  Because if it doesn't then it is not worth anything.

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13 Posts

12-07-2011

michigan

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Re: Fan never stops DSDT / BIOS hacking thread

2011-12-20, 13:49 PM

@smaaz :  Don't bother with this BIOS file.  It does not help.  I have tried it.  You can change the thermal settings, but the fan still never stops.  When you sleep and wake up, the embedded controller resets all your BIOS trip points, so it's worthelss.

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13 Posts

12-07-2011

michigan

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Re: Fan never stops DSDT / BIOS hacking thread

2011-12-20, 13:58 PM

For those intrepid Windows users, the memory location of the fan status in the EC RAM is at 0xAB.

 

the bits are something like this:

 

0           0             0                  0                            0                  0              0              0  

 

?           ?           FAN1         FAN2                       ON/OFF      ?             ?               ?

 

So, if you want both fans on (I think it's just one fan at high speed)  write  0x38 into AB  will give you

0011  1000

 

Both fans OFF, (need to set on/off bit)  write 0x00 into AB

0000  0000

 

If you do this, your computer will overheat and be damaged.  Don't do it.  Always remember to turn all the fan bits back on.  I post this message so that maybe someone who knows what to do won't have to waste time hunting through the EC ram to find the control registers, not so that regular people can burn out their CPUs with rweverthing.

 

(P.S. the on/off bit is actuall ec ram INIT. It is not FANT.  Even though it is listed before the fans in the dsdt dump under ERAM, it is after in the actual bits, is this an endian issue?)

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3538 Posts

07-12-2010

Malaysia

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Re: Fan never stops DSDT / BIOS hacking thread

2011-12-21, 8:52 AM
@All,

Issue has been escalated using rzrfreefr's info.

//JameZ
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20 Posts

10-15-2011

Pakistan

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Re: Fan never stops DSDT / BIOS hacking thread

2012-01-02, 10:33 AM

still no development :S

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265 Posts

10-11-2011

france

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Re: Fan never stops DSDT / BIOS hacking thread

2012-01-02, 12:39 PM

well at least it has been reported twice , so someone is aware

 

http://forums.lenovo.com/t5/Lenovo-3000-and-Essential/G470-fan-running-non-stop/m-p/637679#M34327

 

do you know lenovo policy about customer cares , do they provide feedback ? what is the expected delay ?

 

--
http://rzr.online.fr/q/lenovo# g470 s103t
Lenovo G470 | Model Name : 20078 | M fg Date: 11/03/23 | BIOS: 40CN23WW(V2.09) 06/20/2011 | CPU: i5-2410M | Linux version 3.3.4lenovog470+ (root@lap) (gcc version 4.6.3 (Debian 4.6.3-4) ) #8 SMP Tue May 1 10:23:48 CEST 2012
OS:GNU/Linux/Debian


Lenovo S10-3t | Model Name : 0651 | Mfg Date: 2010/06/08
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3538 Posts

07-12-2010

Malaysia

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Re: Fan never stops DSDT / BIOS hacking thread

2012-01-06, 2:03 AM
@All,

For those in the US and are having this problem, appreciate if you can volunteer the machine for engineering to get the hardware checked.

//JameZ
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8095 Posts

11-19-2007

United States of America

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Re: Fan never stops DSDT / BIOS hacking thread

2012-01-06, 14:52 PM

All,

 

If you have a G470 or G570 with fan that runs at high speed or continuously even when the CPU temps are low, we are looking for a volunteer to send in a system for engineering to look at.

 

We've tested on systems we have, and as often the case, is not easily repeatable - to make progress we are going to need to see an example system.  Please send me a PM and include G570 fan running in your title as I receive a lot of PMs.

 

Based on other fan issues we have worked on, they can generally be solved with a BIOS update.   Setting expectations, once we can recreate the issue, it usually takes about 30 days to get an updated BIOS tested and published to the web.

 

I'll look for your PMs.

 

Thanks

 

Mark

 

 

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265 Posts

10-11-2011

france

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Re: Fan never stops DSDT / BIOS hacking thread

2012-01-06, 18:19 PM

Hi just pm'ed mark ...

 

We already have a technical solution to sumbit to the integration team ... 

 

http://tech.groups.yahoo.com/group/Lenovo/files/#dsdt.dsl 

 

I can help to provide technical details

 

 

I wish upcoming bios will fix the TZ00 bug as detailed at 

 

http://forums.lenovo.com/t5/Lenovo-3000-and-Essential/G470-fan-running-non-stop/m-p/566591#M32428

 

 

and hope upgrading will help to monitor fans's RPM and control them too .

 

Regards

 

--
http://rzr.online.fr/q/lenovo# g470 s103t
Lenovo G470 | Model Name : 20078 | M fg Date: 11/03/23 | BIOS: 40CN23WW(V2.09) 06/20/2011 | CPU: i5-2410M | Linux version 3.3.4lenovog470+ (root@lap) (gcc version 4.6.3 (Debian 4.6.3-4) ) #8 SMP Tue May 1 10:23:48 CEST 2012
OS:GNU/Linux/Debian


Lenovo S10-3t | Model Name : 0651 | Mfg Date: 2010/06/08
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20 Posts

10-15-2011

Pakistan

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Re: Fan never stops DSDT / BIOS hacking thread

2012-01-16, 17:29 PM
still no development :S
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