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05-18-2018

CZ

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After connecting the power adapter, the CPU is lowered at a constant 0.39GHz! Thinkpad Yoga 460

2018-05-18, 10:00 AM

Hello,

 

this has been solved here, but the version of "defect" is indeed the opposite. (sorry my english)

 

As other users solved this problem with - it did not help using more powerful adapter with 90W 4.5A or upgrade BIOS. Power Saver off, no other power saver activated. Many times HW tests from Windows Troubleshooting and Lenovo Vantage - everything OK.

 

I attached here HWiNFO specification. - Lenovo Thinkpad Yoga 460 (Windows 1709, all current drivers updated - no change with update 1803 - same situation)

 

The power adapter (and also i use many others - no change) will immediately reduce the processor frequency to a constant of 0.39GHz and using the bounce between 0 - 15% .Reinstall Windows, HW test and drivers etc. everything is OK.  Even no help from Settings - Windows - Options of Power - set min. usage processor 100% - no affects. The problem persists.

 

..omg... , whats that? Common opening of Explorer, Word, copying etc., and other elementary activities are now a matter of minutes - big loss of performance.

 

Thank for your help

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3 Posts

07-24-2016

AT

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Re: After connecting the power adapter, the CPU is lowered at a constant 0.39GHz! Thinkpad Yoga 460

2018-07-25, 20:40 PM

Hi,

 

this is a BIOS problem. In one version it was fixed, but it came back in a later version again :(

I have the same problem but I installed the software Throttle Stop and then it worked.

 

/C

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1 Posts

05-20-2018

DE

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Re: After connecting the power adapter, the CPU is lowered at a constant 0.39GHz! Thinkpad Yoga 460

2019-05-20, 14:31 PM

I have the same problem with an L380 Yoga and the USB-C Hybrid Dock. CPU Speed is exactly lowered as described. CPU Voltage is then around 0.6V. Newest Bios and Firmware. I would be very happy if there was a fix soon. I cannot use the Dock with the high CPU frequency.

Thanks!

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