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04-16-2021

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T440p: throttled cpu and a code 12 for dptf_cpu

2021-04-16, 12:50 PM

I was recently gifted a T440p (w/o dedicated gpu) with a 4712MQ cpu. Unfortunately the cpu seems to be throttled at 0.78GHz. I'm assuming it has to do with power management, since device manager gives me a code 12 for the Dynamic Platform and Thermal Framework Processor Participant. I haven't been able to resolve that issue. I'm unable to find a conflict to resolve and reinstalling drivers has made no difference. Maybe it's also relevant to know that there is no issue reported with the DPTF Chipset Participant.

 

Hardware IDs:

PCI\VEN_8086&DEV_0C03&SUBSYS_220E17AA&REV_06
PCI\VEN_8086&DEV_0C03&SUBSYS_220E17AA
PCI\VEN_8086&DEV_0C03&CC_118000
PCI\VEN_8086&DEV_0C03&CC_1180

driver version:

8.2.11004.3973

 

 

Moderator comment: Moved to the proper forum. (NateS)

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3565 Posts

08-02-2018

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Re:T440p: throttled cpu and a code 12 for dptf_cpu

2021-04-16, 17:07 PM

Hello T440p !


Welcome to community forums


Just to make sure, can you send us a screenshot of the device manager and another screenshot of the error message?

 

And also, what OS and what version of the OS are you currently running? 

 

Try uninstalling the error message and manually the BIOS, Chipset, and Power management driver here: https://pcsupport.lenovo.com/us/en/products/laptops-and-netbooks/thinkpad-t-series-laptops/thinkpad-t440p/downloads/driver-list/

 

You need to choose the correct OS first before proceeding.


Let us know how it goes.

 

 


Jwes_Lenovo



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5 Posts

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Re:T440p: throttled cpu and a code 12 for dptf_cpu

2021-04-18, 7:42 AM

I discovered something new regarding the cpu throttling. The throttling happens on a 65w adapter (came with the T440p), but doesn't throttle on a 90w adapter (from a different system). I guess that could be a more probable source of the throttling. One problem, though: the laptop switches off within a minute or so after booting on the 90w adapter. The battery already didn't work, but I thought it was just a faulty battery. Now I think it might have something to do with the cpu power draw and thus it's related to the throttling.

 

DPTF code 12 remained unchanged, of course. So the DPTF possibly might not have anything to do with my predicament after all.

 

@Jwes_Lenovo, I've attached a screenshot. The OS that came installed on this system is Windows 10 Build 19042.

I've had bad experiences with updating the BIOS on motherboards. So I'd rather hold off on that for the time being, until there's no way around it. I have installed the drivers from the T440p support page, no change. Honestly, getting DPTF to run isn't as high a priority (if at all) as being able to get what I need from the cpu in general.

 

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01-02-2010

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Re:T440p: throttled cpu and a code 12 for dptf_cpu

2021-04-18, 15:48 PM

What is the capacity of the power supply you are using?  Is it OEM (Lenovo) branded?


Rich


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Re:T440p: throttled cpu and a code 12 for dptf_cpu

2021-04-18, 16:04 PM

@richk 

Battery: 10.8v; 5.2Ah; 57Wh; Lenovo branded (FRU 45N1147).

Included adapter: 20v; 3.25Ah; 65W; Lenovo branded; manufactured by Chicony (FRU 00PC757).

Other adapter: 20v; 4.5Ah; 90W; Lenovo branded (FRU 45N0500).

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Re:T440p: throttled cpu and a code 12 for dptf_cpu

2021-04-18, 16:19 PM

65W is not enough.  With integrated graphics, you need a 90W adapter.  If you had a dedicated GPU, you would need 135W.  Only the dual core CPU with integrated graphics will work with 65w


Rich


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Re:T440p: throttled cpu and a code 12 for dptf_cpu

2021-04-18, 16:28 PM

That makes sense, thank you. Would you per chance also have an idea as to why this laptop doesn't seem to be able to handle the 90W adapter, despite it being listed as compatible with the system?

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Re:T440p: throttled cpu and a code 12 for dptf_cpu

2021-04-18, 16:37 PM

I would confirm that the 90w adapter is reporting its wattage correctly.  If you have an ohm meter, you can measure the resistance between the outer surface of the rectangular plug and the signal pin in the middle of the rectangle.  A 90w adapter should read about 550 ohms.  DO THIS TEST WITH THE ADAPTER NOT CONNECTED TO AN AC SOURCE.


Rich


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Re:T440p: throttled cpu and a code 12 for dptf_cpu

2021-04-19, 5:57 AM

@ richk wrote:

A 90w adapter should read about 550 ohms. 

 

Just checked. That's the reading I got.

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Re:T440p: throttled cpu and a code 12 for dptf_cpu

2021-04-19, 6:32 AM

I cannot think of anything else to try.  What is your BIOS version


Rich


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