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207 Posts

08-28-2008

Israel

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  • Message 351 of 1217

Re: T420s Fan noise Issue

2011-09-09, 10:29 AM

wrote:

I found it in the Bios.

 

So i have noticed that the fan goes some timess down to 2000rpm with cpu temp at ~45°C so I think that is a litle divrent. 

 

Bios is 1.28  and EC 1.10

 

 



CPU 41C, fan is 4000RPM.

___________________________________________________________
Lenovo Thinkpad T420s
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3 Posts

09-09-2011

Wolfsburg

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  • Message 352 of 1217

Re: T420s Fan noise Issue

2011-09-09, 10:52 AM
Hi JameZ,

could you please give me your email adresse, so that I can directly discuss with you. I have the same problem with my brand new T420s.
HoaNam
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3 Posts

09-09-2011

Wolfsburg

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  • Message 353 of 1217

Re: T420s Fan noise Issue

2011-09-09, 10:55 AM

Hi JameZ,

My laptop data: TYPE 4174-NDG S/N * 11/6

 

Moderator edit by bananaman: Masked serial number to prevent misuse.

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2 Posts

11-19-2010

Germany

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  • Message 354 of 1217

Re: T420s Fan noise Issue

2011-09-09, 13:28 PM

Same issues here. Unfortunately, thinkfan / TPFC is still required.

~$ sensors
acpitz-virtual-0
Adapter: Virtual device
temp1:        +46.0°C  (crit = +97.0°C)

coretemp-isa-0000
Adapter: ISA adapter
Physical id 0:  +47.0°C  (high = +86.0°C, crit = +100.0°C)
Core 0:         +47.0°C  (high = +86.0°C, crit = +100.0°C)
Core 1:         +45.0°C  (high = +86.0°C, crit = +100.0°C)

thinkpad-isa-0000
Adapter: ISA adapter
fan1:        3997 RPM

 

~$ sudo dmidecode -t0
# dmidecode 2.9
SMBIOS 2.6 present.

Handle 0x000F, DMI type 0, 24 bytes
BIOS Information
	Vendor: LENOVO
	Version: 8CET48WW (1.28 )
	Release Date: 08/15/2011
	Address: 0xE0000
	Runtime Size: 128 kB
	ROM Size: 8192 kB
	Characteristics:
		PCI is supported
		PNP is supported
		BIOS is upgradeable
		BIOS shadowing is allowed
		Boot from CD is supported
		Selectable boot is supported
		EDD is supported
		3.5"/720 KB floppy services are supported (int 13h)
		Print screen service is supported (int 5h)
		8042 keyboard services are supported (int 9h)
		Serial services are supported (int 14h)
		Printer services are supported (int 17h)
		CGA/mono video services are supported (int 10h)
		ACPI is supported
		USB legacy is supported
		BIOS boot specification is supported
		Targeted content distribution is supported
	BIOS Revision: 1.28
	Firmware Revision: 1.16

Edit: Embedded Controller FW version is also the new one, I checked that in BIOS. (however i cannot dump this data while the system is running, sorry).

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163 Posts

07-02-2011

USA

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  • Message 355 of 1217

Re: T420s Fan noise Issue

2011-09-09, 16:01 PM

Updated BIOS. Confirmed EC version 1.10 (8CHT23WW) and BIOS version 1.28 (8CET48WW). Problem still not fixed.

 

I just left the laptop idle for 4 hours. CPU temperature went down to 34C, but fan spun at 4000RPM the entire time. :smileysad:

 

Machine type 4170CTO, Windows 7 x64

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3 Posts

09-10-2011

Hong Kong S.A.R of China

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  • Message 356 of 1217

Re: T420s Fan noise Issue

2011-09-10, 6:35 AM

@JameZ

       

        Where can I download the 1.26/1.08 bios version, which originally came with the machine. After I install the new version 1.28, I still feel the original one is better for the fan sound control, but when I wanna turn back, I couldnt find any copies online, so could you please give me the download link for the version 1.26/1.08. Thanks  

 

 

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5 Posts

09-10-2011

Prague, CZ

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  • Message 357 of 1217

Re: T420s Fan noise Issue

2011-09-10, 7:15 AM

TPFancontrol works great, BIOS 1.28 does not - even at idle fan sometimes stays at 4000rpm after heavier load, when CPU temp already cooled down to 55C or so.

 

Have no problem using TPFancontrol as a solution though. May I ask you if there are any recommended modifications to TPFancontrol.ini for T420s? If so, could somebody put one for download?

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34 Posts

03-24-2010

USA

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  • Message 358 of 1217

Re: T420s Fan noise Issue

2011-09-10, 20:29 PM

Updated BIOS. Confirmed EC version 1.10 (8CHT23WW) and BIOS version 1.28 (8CET48WW). Problem still not fixed.

Fan stay at 4k rpm.

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34 Posts

04-27-2011

San Francisco, CA

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  • Message 359 of 1217

Re: T420s Fan noise Issue

2011-09-11, 0:13 AM
Just wanted to elaborate on my previous test. The new bios seems to work when the computer is in battery mode, but if it's plugged into AC, the fan eventually shoots up to 4000RPM and stays there.

Balance all parameters is selected in power manager (3.62) for both battery and AC power.

Can anyone else confirm or deny these findings?
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163 Posts

07-02-2011

USA

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  • Message 360 of 1217

Re: T420s Fan noise Issue

2011-09-11, 1:24 AM

wrote:
Just wanted to elaborate on my previous test. The new bios seems to work when the computer is in battery mode, but if it's plugged into AC, the fan eventually shoots up to 4000RPM and stays there.

Balance all parameters is selected in power manager (3.62) for both battery and AC power.

Can anyone else confirm or deny these findings?

antsh: Even the old BIOS sometimes controlled the fan properly in battery mode. This might be the same behavior as before.

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