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13 Posts

07-09-2020

Germany

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  • Message 11 of 181

Re:T14 AMD battery drain in standby (Linux)

2020-09-28, 5:34 AM

+1

 

Same battery drain here...

 

Same hardware as OP but running Kubuntu 20.04. Kernel doesn't matter as I update to latest 5.8.x whenever available. Red LED is blinking after S3. Over night I get ~1.5% drain in suspend.

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9 Posts

10-10-2020

Belgium

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  • Message 12 of 181

Re:T14 AMD battery drain in standby (Linux)

2020-10-10, 7:58 AM

Hello,

 

same issue for me. Tried various things without success (TLP, PowerTop, latest kernel, disable lots of things in the BIOS, ...).

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29 Posts

09-08-2020

Germany

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  • Message 13 of 181

Re:T14 AMD battery drain in standby (Linux)

2020-10-11, 12:43 PM

@ MarkRHPearson wrote:
 

 

Hi @srgLoop 

 

I'll look into it. 

 

As you note - we're still doing the HW enablement and Ubuntu cert on the T14 AMD; it hasn't been through e-certification yet either - so it's quite possible there are still pieces in there that aren't right. 

 

On the T14 Intel I know the card reader and touchscreen (if you have that option) are preventing reaching the lower power states and are being worked on - but you've already taken care of the card reader so it's likely not that.

 

Thanks for all the details @ MarkRHPearson wrote:

 

 

Are there any news regarding the battery drain issue? It obviously affects multiple people so I think that it is
worth spending time on. It would be at least nice to know that you guys can reproduce the problem and are
working towards a fix.

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23 Posts

08-19-2020

Germany

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  • Message 14 of 181

Re:T14 AMD battery drain in standby (Linux)

2020-10-13, 19:58 PM

Pretty comparable battery drain in suspend on T14s AMD.

 

I also noticed battery charge loss in poweroff(!) state: 9% in ~27 hours.

Just reboot takes about 1%.

 

Do someone observed such a drain or it is just my device?

 

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29 Posts

09-08-2020

Germany

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  • Message 15 of 181

Re:T14 AMD battery drain in standby (Linux)

2020-10-14, 13:58 PM
I have not observed any charge loss in the poweroff state so far (T14 AMD). In fact, this is one of the workarounds I'm currently using: hibernate instead of standby. However, given that hibernate is not 100% stable on Fedora, I'm far from being satisfied with it.
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27 Posts

10-11-2020

United States of America

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  • Message 16 of 181

Re:T14 AMD battery drain in standby (Linux)

2020-10-26, 17:32 PM

In my thread @someotherguy said:

 

 

On T14 AMD, in "linux" sleep mode, any key will wake up from S3 - it is still behaving like Modern Standby even though Modern Standby is disabled by BIOS setting.

 

 

So at least in some aspects, the T14 AMD S3 is closer to "modern standby" than it should be.

 

I haven''t yet measured my drain.

 

  1. The first thing is to understand the expected drain.
    1. What is expected for "modern standby"?
    2. What is expected for S3?
  2. Confirm that it's in fact entering S3. I have not yet looked into it, but considering the os is till running in "modern standby" it ought to be possible to detect that vs S3.

 

@srgLoop Have you confirmed S3? Do you have any links for the expected S3 drain?

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29 Posts

09-08-2020

Germany

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  • Message 17 of 181

Re:T14 AMD battery drain in standby (Linux)

2020-10-28, 16:50 PM
At least from the point of view of the kernel my T14 does enter S3. I have $ cat /sys/power/mem_sleep s2idle [deep] and grepping dmesg for S3 after resume shows reveals "PM: suspend entry (deep)". In BIOS I have "Sleep Mode" set to "Linux", which is supposed to activate S3 and disable the modern standby. Of course, if S3 is somehow flawed on the BIOS / ACPI tables level, there is not much the OS can do here. This is something I trying to learn from Lenovo people, but so far I haven't got a clear answer, although the issue is trivial to reproduce.
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6 Posts

11-08-2020

China

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  • Message 18 of 181

Re:T14 AMD battery drain in standby (Linux)

2020-11-08, 9:31 AM

Same situation. Try every method in the Google. S3 mode is confirmed by dmsg, tlp ok, wake up ok. But there still about 15% battery drain one night in standby mode. Can you give me more details about how you enable the laptop to "hibernate" not the "standby" 

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29 Posts

09-08-2020

Germany

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  • Message 19 of 181

Re:T14 AMD battery drain in standby (Linux)

2020-11-08, 17:11 PM

This is not ThinkPad-specific, but depends on the distro you are using. In anycase you need a swap partition >= size of your RAM. AFAIR I used this guide for Fedora

 

https://www.ctrl.blog/entry/fedora-hibernate.html

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2 Posts

11-08-2020

Argentina

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  • Message 20 of 181

Re:T14 AMD battery drain in standby (Linux)

2020-11-08, 21:08 PM

Same problem here using:

  • Arch Linux
  • Kernel 5.8
  • Sleep State= Linux (S3)

 

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