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10 Posts

08-28-2019

United States of America

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ThinkPad T-series locking processor speed to 0.39 GHz

2021-04-01, 21:58 PM

I've had a handful of T480/T490/T14 computers in the past few months with reported slow speeds. Upon investigating, it looks like the processor is throttling itself down.

 

I haven't had this issue personally and considering how few users are reporting it I think that maybe there is a potential hardware or firmware issue going on. Has anyone had experience with this? The last user I worked with, I ran all system updates, then uninstalled all Firmware items in Device Manager and that temporarily fixed the problem but it has now come back. No other updates are available.

 

Let me know if there is any log collecting I can do that would be helpful in diagnosing the problem.

 

Thanks

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5657 Posts

08-02-2018

Philippines

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Re:ThinkPad T-series locking processor speed to 0.39 GHz

2021-04-02, 11:36 AM


Hello ngreene!

 

Welcome to community forums

 

Any changes made or any updates installed before the issue came up?

 

Just to clarify, the T480, T490, and T14 are all having the same issue? Have you tried running the hardware scan from the Lenovo Vantage app? 

 

Could you send us a screenshot of each of the system information, containing the BIOS version and OS version? 

Let us know.

 

 


Jwes_Lenovo



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10 Posts

08-28-2019

United States of America

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Re:ThinkPad T-series locking processor speed to 0.39 GHz

2021-04-14, 18:03 PM

The problem is completely random so it doesn't impact all units.

 

The ones I have seen it on are running Windows 10 1909. Currently, I only have one out in the wild that is reporting this problem. I have not run a scan from the Vantage app. Let me know what specific information I can retrieve to help isolate the problem.

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5657 Posts

08-02-2018

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Re:ThinkPad T-series locking processor speed to 0.39 GHz

2021-04-15, 13:56 PM


Which model are you having an issue with? When does the throttling happen? Does it happen on a particular app or window? Try running a scan just to make sure there is no hardware failure.

 


Jwes_Lenovo



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1 Posts

06-23-2021

United Kingdom of Great Britain and Northern Ireland

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Re:ThinkPad T-series locking processor speed to 0.39 GHz

2021-06-23, 15:04 PM

I am also seeing the issue.

 

I have updated the GPU and because we use a Dell Port Replicator updated the Thunderbolt Driver.

 

For the Dell Port Replicator we also install the Firmware and the Display Link Software.

 

But I believe the issue is with the GPU Driver.

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5657 Posts

08-02-2018

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Re:ThinkPad T-series locking processor speed to 0.39 GHz

2021-06-23, 15:44 PM


When does the throttling happen? Does it happen on a particular app or window?

 

You might want to provide the model of your machine, OS version, BIOS version, and GPU driver version?

 

 


Jwes_Lenovo



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39 Posts

05-31-2021

United States of America

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Re:ThinkPad T-series locking processor speed to 0.39 GHz

2021-06-23, 22:18 PM

I'd also suggest controlling for environmental factors. Is the room temperature the same for affected vs. unaffected users (e.g. 20C vs. 25C can make a difference)? What about usage flat on desk vs. usage on-lap? (That was the big one for me, on-lap throttling is not advertised for this series but appears to be silently included.)

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