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5 Posts

03-10-2019

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Lenovo T470 CPU slow and sluggish performance

2019-03-10, 0:29 AM

Hello, I've bought a Lenovo t470 that worked great for 6 months, and recently it started to slow down its performance heavily. Using Resources Monitor, I saw that the CPU was working at 100% even it didn't had any kind of programs open. I have already seen that this problem was very common on this laptop, and it also had a solution: the 1.39 BIOS update released in 2017.

I updated BIOS and video card drivers, and none of this solved the problem. I also dug for days in forums looking for possible solutions, as battery performance settings, and others, and none of this worked. The laptop is using Windows 7 and the lastest driver updates.

 

Any word of advice and also any help from official Lenovo employees would be kindly received. As a longlife Lenovo customer (more than 10 years and this is my fourth Thinkpad laptop) I'm really struggling to have any response from official Lenovo employees since I have been calling their tech support for 2 weeks straight with no response, and it would be a shame to have this kind of incident ending such a long-lasting relationship with the brand.

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3304 Posts

12-11-2015

US

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Re: Lenovo T470 CPU slow and sluggish performance

2019-03-10, 3:10 AM

I would start by sorting the processes by CPU usage using the CPU  tab in Resource Monitor, expanding the Process and Services sections and then clicking on the to of the CPU column in each section to sort the processes and services by CPU usage to try to identify what processes are using most CPU time.

 

 

You can also do this by using Task Manager (press CTRL +ALT + DEL and select "Start Task Manager)  to identify what process(s) is causing the high CPU usage.    Once Task Manager is open, ,make sure to select "Show Processes from All User" is selected, then click on the "Process Tab", and then click on the top of the CPU% tab to sort that column  ˅  to show the process or processes that are causing the high CPU usage.

 

Finding out what process or service is causing the high CPU usage should help lead to an answer.

 

Best of luck,

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5 Posts

03-10-2019

AR

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Re: Lenovo T470 CPU slow and sluggish performance

2019-03-10, 5:26 AM
Hey, JDGillis, thanks for replying. I have already done that, and there is no hidden processes draining my CPU usage. As I said earlier, it's a common problem that Lenovos t470 have, but it has not been fixed by updating the BIOS drivers.
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Re: Lenovo T470 CPU slow and sluggish performance

2019-03-10, 5:59 AM

Does this problem occur when booted in Safe Mode?   If it does not, then that might rule out the BIOS being the culprit. 

If Resource Manager reports 100% CPU usage, but does not show the services or processes that are responsible, that makes me suspect malware. 

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5 Posts

03-10-2019

AR

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Re: Lenovo T470 CPU slow and sluggish performance

2019-03-10, 6:14 AM

The problem ocurred also when booting in safe mode way back when it did not had the BIOS updated and it also happens now, trying with all updated drivers. As I said in previous post, this has already happened in the past and it was solved for other users.

 

I don't believe it's a malware problem since the usage of the laptop was mainly office related and it didn't had any strange activities during the period that started to show the problem.

 

PS: the laptop had 55 days of warranty when this all began, and its now down to 42 days. Still no response from Lenovo employees.

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Re: Lenovo T470 CPU slow and sluggish performance

2019-03-10, 6:36 AM

Also, I just ran the Diagnostic UEFI Bootable app during startup and then the CPU diagnostics tool. I got a log file with the following results:

 

Moderator note: serial number removed to prevent abuse.  MT-M is 20JM000CUS

 

 

SERIAL_NUMBER: PF******
BIOS_VERSION: N1QET80W (1.55 )
MACHINE_MODEL: ThinkPad T470 W10DG
APPLICATION_VERSION: Version 04.06.000

BEGIN_EXECUTION
+++ 20190310T031644UTC CPU EXTENDED DIAGNOSTIC 155218780400
UDI: Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz - INTEL
DISPLAYNAME: Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz - INTEL

CPU_MODEL: Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz
CPU_VENDOR: INTEL
CPU_CORES: 2
CPU_ENABLED_CORES: 2
CPU_THREADS: 4
CPU_SIGNATURE: 406e3
CPU_MAX_SPEED: 2.400 GHz
CPU_CURRENT_SPEED: 2.401 GHz
CPU_FEATURES: MMX, EM64T, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AES, AVX, CLMUL, FMA, PSE, PSE-36, IDA/Turbo boost, HTT, XD, VMX
CPU_CACHE_L1: 2 x 32 KB Data, 2 x 32 KB Instruction
CPU_CACHE_L2: 2 x 256 KB Unified
CPU_CACHE_L3: 1 x 3 MB Unified
START TESTS
20190310T031644UTC START CPU_STRESS_TEST
20190310T032644UTC STOP CPU_STRESS_TEST SUCCESS 600 S
STOP TESTS UCP200000-UO7X1D
--- CPU EXTENDED DIAGNOSTIC
FINAL_EXECUTION

FINAL_RESULT_CODE U1LLGWVAP-6LNCE1

 

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5 Posts

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Re: Lenovo T470 CPU slow and sluggish performance

2019-03-17, 23:21 PM

Hi everyone! It's been a couple weeks since I made this post, and the problem was solved roughly one week ago. The user name Rydeen, also a Lenovo Employee helped me out and guided me trough out the process of troubleshooting my problem. This are the steps I followed thanks to his suggestions:

 

  1. First, checking if the problem solves when booting the laptop without the AC, without the external battery and AC, without the internal battery but only using the external, and without the internal only using AC (Altough this step is not recommended due to the battery AC charger is 45W because it can damage the hardware because a high inrush power consumption). None of this steps solved or isolated the problem.
  2. Second, checking if the problem solves when booting the laptop after withdrawing the coin battery and making all the BIOS configurations go back to default by force. Remember that before trying this and also before trying to remove the internal battery you have to disable the internal battery in the BIOS setup. You can learn how to do this step watching this video. This did not solved the problem either. (Time and date settings have to be adjusted also before booting).
  3. In third place, as Rydeen suggested to me, I tried to disable I/O device ports one by one at BIOS Setup. After I disabled them one by one, I booted the laptop and the problem remained until I disabled the Thunderbolt 3 port. After that the problem was gone, and my laptop was fully back to normal.

I have been using the laptop with different levels of intensity, with AC, batteries and also during several hours. The problem seems permanently solved.

 

I want to give a huge shoutout to Rydeen who helped me to solve this problem and also answered my questions with details and followed his replies with links to the Lenovo Maintenance Manual which proved very useful to properly remove the batteries. Thanks a lot, and I will mark this post as solved.

0 person found this solution to be helpful.

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1 Posts

06-14-2019

AU

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Re: Lenovo T470 CPU slow and sluggish performance

2019-06-14, 1:25 AM

Registred here just to say thank you for this solution. I was suffuring from this problem for months. After disabling TB3 port my laptop is back to life again! Cheers man!

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75 Posts

02-19-2018

CH

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Re: Lenovo T470 CPU slow and sluggish performance

2020-02-17, 12:33 PM

Hi AngelOsario

 

We tried to disable the Thunderbolt 3 port on our T470 as well, but this will genearte a problem with the usb-c connection to USB-C Docks.

External Monitor attached to the Dock is working fine but Keyboard and Mouse also attched to the dock not anymore.

So , i'm guessing you are not using USB-C Docks, do you?

 

We did a test and disabled Thunderbolt 3 port on a T480 and T490, the USB-C Dock connected HW is working fine.Wondering why.

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5 Posts

03-10-2019

AR

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Re: Lenovo T470 CPU slow and sluggish performance

2020-02-17, 12:49 PM

No, we are not. Sometimes we just use a regular USB mouse in the 2.0 USB slot. Since the fix I never had any otherproblem. HDMI cables, external disks, and memory sticks work as well.

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