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07-22-2019

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T14, T14s & X13 G1 AMD Linux - S3 standby battery drain improvements

2021-09-08, 15:04 PM

As I'm locking the over-long AMD platform thread on standby issues I'm creating this discussion thread to continue the discussion on all S3 battery drain related improvement topics.

 

Notes:

 - for T14, T14s and X13 G1 AMD Please make sure you have updated to the latest BIOS versions. Fixes for many sleep battery drain related issues were delivered here

 - For these platforms unless you are using 5.14 or newer kernel and are willing to use an unsupported sleep mode please make sure the Sleep mode is set to Linux mode in the BIOS. Older kernels do not have S0ix support

 

I'll aim to add links to key posts in the long https://forums.lenovo.com/t5/Other-Linux-Discussions/T14-AMD-battery-drain-in-standby-Linux/m-p/5037674 thread, but it's going to take me time to go through it.

 

I'm creating a separate discussion thread on S0ix support

 

Thanks

Mark

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45 Posts

10-11-2020

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Re:T14, T14s & X13 G1 AMD Linux - S3 standby battery drain improvements

2021-09-08, 15:58 PM

@ MarkRHPearson wrote:

Hi

 

On that birthday note...just to let you know, and to be transparent, I am planning on locking this thread.

 

The 1.35 BIOS released, which I will mark as the solution (once I find it), would appear to have resolved the main issue which prompted this discussion. 

 

The main issue is S3 battery drain. The 1.35 readme does not even mention it:

 

CHANGES IN THIS RELEASE
 Version 1.35

 
[Important updates]
- Included a security issue update. 

[New functions or enhancements]
- Added Sonix IR camera support.

[Problem fixes]
- Fixed an issue that Linux Ctrl keys not working in GRUB.

 

What are you claiming is the S3 drain with 1.35? That will need to be verified and if it's above 500 mwh (it should really be lower but this is the maximum acceptable level), it's not resolved.

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35 Posts

01-23-2021

Argentina

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Re:T14, T14s & X13 G1 AMD Linux - S3 standby battery drain improvements

2021-09-08, 16:30 PM

I totally agree that different threads should be opened for different issues but the original epic was appropriate because it's affecting all new AMD laptops. It was nearly 100 pages, I believe in this case you only want to distribute the noise so it doesn't get bigger.

 

Why do you say that BIOS 1.35 solves the issue Mark?

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104 Posts

02-14-2021

Ukraine

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Re:T14, T14s & X13 G1 AMD Linux - S3 standby battery drain improvements

2021-09-08, 16:55 PM

> Why do you say that BIOS 1.35 solves the issue Mark?

 

because it's a post-truth world, LOL.

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09-08-2021

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  • Message 5 of 34

Re:T14, T14s & X13 G1 AMD Linux - S3 standby battery drain improvements

2021-09-08, 17:04 PM

@ aproximacion wrote:

I totally agree that different threads should be opened for different issues but the original epic was appropriate because it's affecting all new AMD laptops. It was nearly 100 pages, I believe in this case you only want to distribute the noise so it doesn't get bigger.

 

Why do you say that BIOS 1.35 solves the issue Mark?

I can confirm the issue is not solved even in the latest model. I have t14 gen2 with ryzen 7 pro 5850U and I'm having the same battery drain issues as countless others in suspend mode. Lost 20% in about 8-9 hours

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687 Posts

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Re:T14, T14s & X13 G1 AMD Linux - S3 standby battery drain improvements

2021-09-08, 17:07 PM

Hi,

 

The issue was significantly improved and the platform now meets industry standard energy specifications with I believe 1.33 and 1.34 - but as we had all those BIOS update issues I put 1.35 as that's the latest/safest to update to. I know we want lower values, and they are looking potentially achievable, but I don't think it's unfair to say that significant improvements have been made and those are fixes that have been implemented.

 

I'm genuinely not trying to obfuscate anything here. Nobody could find anything in that thread.

Feedback from the forum is that those giant threads aren't useful or helpful - and that's what this forum is for.

 

At some point the FW team are going to come back to me and say "we've done what we can" - and there will be a bunch of unhappy upset people. This thread is open because

1) We haven't reached that stage yet

2) There is a bunch of really useful details being collected from users and I'm hoping that continues.

But it should stay related to the G1 S3 issues - other topics should branch off so they can be tracked separately.

 

I'm standing by my decision to lock the old thread. I know some won't like it but I'm trying to make these forums a better resource for our users. If it turns out to be a big mistake at least I'll learn from it - but my gut feeling is 80 pages on a year long thread is not a healthy practice so I'm trying this instead.

 

Mark

 

 

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10-11-2020

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  • Message 7 of 34

Re:T14, T14s & X13 G1 AMD Linux - S3 standby battery drain improvements

2021-09-08, 17:14 PM

@ MarkRHPearson wrote:

Hi,

 

The issue was significantly improved and the platform now meets industry standard energy specifications with I believe 1.33 and 1.34 - but as we had all those BIOS update issues I put 1.35 as that's the latest/safest to update to.

 

 

"industry standard energy specifications" is vague irrelevant. Be specific. What is the current (as of 1.35) expected S3 drain in mwh? If it's well above 500 it's garbage.

 

 

Moderator comment: Post edited to conform with the Community Rules. Keep it civil. (NateS)

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687 Posts

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Re:T14, T14s & X13 G1 AMD Linux - S3 standby battery drain improvements

2021-09-08, 17:57 PM

Energy Star 8.0

https://www.energystar.gov/products/spec/computers_version_8_0_pd

 

Mark

 

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54 Posts

01-27-2021

Netherlands

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Re:T14, T14s & X13 G1 AMD Linux - S3 standby battery drain improvements

2021-09-08, 19:27 PM

@ MarkRHPearson wrote:

Energy Star 8.0

https://www.energystar.gov/products/spec/computers_version_8_0_pd

 

I have looked at the document. The relevance of that document and the associated certification is the P_sleep variable's value used (and therefore measured on a model representative of those sold) by Lenovo for the certification of the T14 AMD G1, where sleep=S3, of course. Can you share this value for S3 P_sleep [mW] in this thread, please? It may also be necessary to include the duration(s) T of the sleep periods used for the measurement, as I noticed that the time-average power draw during S3 sleep depends on that duration (it decreases with longer durations).

 

Sharing that information would be most helpful to assess where things stand. If it is higher than what most people here are already now getting, we should conclude that the Energy Start compliance is not relevant (as some have already suggested). If it is clearly lower than what most people are getting, then Lenovo should work with us to at least attain a discharge rate as low as claimed for the certification. (Afterwards, we could work towards a value even lower, but that would be a next step.)

 

BTW: I have seen people use units in these threads that are incorrect (likely due to the fact that one measurement script had wrong units for a while). The (average) discharge rate for a period of sleep is measured in mW (milliWatt) and the total energy consumption in mWh (milliWatt-hour, i.e., one just multiplies the rate by the time in hours). (Shameless plug: my script does this correctly AFAICT.) One can also use W and Wh, but then usually we'd need to bother with fractional values.

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45 Posts

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  • Message 10 of 34

Re:T14, T14s & X13 G1 AMD Linux - S3 standby battery drain improvements

2021-09-08, 19:42 PM

@ MarkRHPearson wrote:

Energy Star 8.0

https://www.energystar.gov/products/spec/computers_version_8_0_pd

 

Mark

 

 

Post the current, expected S3 drain in mwh, that you claim makes this "resolved". It's obnoxious to expect us, paying costumers, to have to parse it out from arcane third party technical documents. 

 

 

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