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15 Posts

06-22-2021

Germany

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Re:T14 AMD battery drain in standby (Linux)

2021-07-05, 5:08 AM

@ ikovnatsky wrote:

> maybe the lenovo bios teams can at least fix the power-off battery drain which used to work a few bios versions back ?

 

can you please tell which BIOS version worked for you, not draining the battery in power off state?

 

i noticed that on 1.30 (it was really big), but eventually i realized previous version 1.29 had it also, just much less. 

 

i could not try the versions before, somehow bios did not let me downgrade further 1.29. 

 

mine came preinstalled with 1.30, i just gathered from this thread that there apparently were older bios versions which didnt have the power off battery drain issue..

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25 Posts

04-05-2021

Japan

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Re:T14 AMD battery drain in standby (Linux)

2021-07-05, 9:08 AM

Hi, I have issues with sleep under Windows and thus created this thread month or two ago. https://forums.lenovo.com/t5/ThinkPad-T400-T500-and-newer-T-series-Laptops/T14-P14s-Gen-1-Issues-BIOS-Sleep-mode-Touchpad-and-more/m-p/5083281?page=1#5369126 I have got some general advice from the forum support but it did not solve the issue. I am planning to report my problems to the customer service when I will have time to set up my old laptop, so I could send P14s to Lenovo for repair.

 

My main problem, other than the S3 does not work in Windows (reboots itself) is that it time to time (few times a week) consumes a high amount of energy during the modern standby sleep and drains the battery quickly (around 7.5W, 23% or 11.5Wh of battery in one and half hour in one of many other cases). In "normal" times, it consumes around 500-600mW.

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51 Posts

01-21-2018

United Kingdom of Great Britain and Northern Ireland

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Re:T14 AMD battery drain in standby (Linux)

2021-07-05, 9:12 AM

I'm curious how you measured the 500-600mw S0/Standby power consumption?

That seems too good to be true, as Lenovo themselves have said they measured the S0 at 1.26wh. I've also got a P14s (AMD) and measured 1.67wh.

If you really are able to get 0.5wh S0, then we would very much like to know how!

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25 Posts

04-05-2021

Japan

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Re:T14 AMD battery drain in standby (Linux)

2021-07-05, 9:30 AM

Hi, I just got the numbers from the windows sleep report (how to create it https://www.tenforums.com/tutorials/64555-generate-sleep-study-report-windows-10-a.html).

 

Yes, the normal drain is alright for me, the problem is, that unexpectedly, there is a huge battery drain which causes overheating, fan spinning and sometimes power button not reacting, so I cannot use sleep mode while travelling with the laptop.

 

EDIT: Enclosing the sleep study report

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45 Posts

02-28-2021

Isle of Man

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Re:T14 AMD battery drain in standby (Linux)

2021-07-05, 9:44 AM

@ blaumetallic wrote:

mine came preinstalled with 1.30, i just gathered from this thread that there apparently were older bios versions which didnt have the power off battery drain issue

 

My result after ~40 h. power off is 0% battery drain, measured with tlp-stat.

 

I'm on 1.32 BIOS. Definitely this is a clear improvement over 1.30 that was completely broken for me. I cannot say anything about 1.29 because I updated very soon after laptop arrived.

 

I can presume that at least on my setup power off drain is for the moment a non issue. Maybe after three or four days I could notice some drain but probably nothing to worry regarding battery life.

 

Later I will try suspend and see how it goes...

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25 Posts

04-05-2021

Japan

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Re:T14 AMD battery drain in standby (Linux)

2021-07-05, 10:04 AM

I can confirm, that on Windows, there is also no power off drain with BIOS 1.32

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51 Posts

01-21-2018

United Kingdom of Great Britain and Northern Ireland

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Re:T14 AMD battery drain in standby (Linux)

2021-07-05, 10:12 AM

I ran sleep study on mine and confirmed the 1.6-1.7wh loss during S0 standby, and it's reporting 99% low power state time too.

Could you share what version BIOS and build of Windows you're using please?

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51 Posts

01-21-2018

United Kingdom of Great Britain and Northern Ireland

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Re:T14 AMD battery drain in standby (Linux)

2021-07-05, 10:27 AM

Just a comment on the Energy Star certification, as while it's been said by many that they don't think it's useful, I don't think it's been reasoned/articulated in this way:

 

Energy Star is solely to do with environmental impact. It was setup by the Environmental Protection Agency. It is nothing to do with user experience or performance of tech, only the impact of it to the environment. The pass/fail factors in all operating modes to average out total consumption over a year.

Eg. You could consume something crazy like 10w while asleep (and burn through a whole battery in a matter of hours), but reduce the fully on states consumption such that it still "passes" due to the equations (etec and weighted mode values).

While we all appreciate we are contributing slightly less to climate change with our laptops with the latest bios, that is not our primary concern in this thread.

 

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26 Posts

10-10-2020

Belgium

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Re:T14 AMD battery drain in standby (Linux)

2021-07-05, 10:33 AM

I'd simply like to be able to close my laptop, and be able to use it again when I reopen it.

 

Like any other laptop I had.

 

Not just find out that the day after it's already lost 50% of its battery.

 

And I'd like a clear statement of Lenovo on the matter, to know what to expect.

Apparently from what Mark said they won't be able to solve it.

So will it be possible to get a refund so I can buy a real usable laptop ? And can we get answers soon and not wait another year ?

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15 Posts

06-22-2021

Germany

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  • Message 490 of 841

Re:T14 AMD battery drain in standby (Linux)

2021-07-05, 11:16 AM

@ theowatt wrote:

 

My result after ~40 h. power off is 0% battery drain, measured with tlp-stat.

 

I' on 1.32 BIOS. Definitely this is a clear improvement over 1.30 that was completely broken for me. I cannot say anything about 1.29 because I updated very soon after laptop arrived.

some people in the thread complained about power off battery drain also with 1.32..  but its great to hear that it improved for you! i installed 1.32 yesterday and will check in the evening..

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