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24 Posts

12-04-2020

Portugal

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Re:T14 AMD battery drain in standby (Linux)

2021-02-28, 9:56 AM

 

 

Users of Pop!_OS please pay attention as 1.30 has made it into LVFS and is now available for install.

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2 Posts

03-01-2021

Russian Federation

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Re:T14 AMD battery drain in standby (Linux)

2021-03-01, 4:03 AM

Disabling LID sensor in BIOS fixed problem with power-off battery drain.

 

BIOS 1.30, T14 Gen1, Windows/Linux dual boot.

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22 Posts

10-01-2012

Austria

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Re:T14 AMD battery drain in standby (Linux)

2021-03-01, 8:49 AM

I can definitely confirm battery drain in power-off state on a T14s AMD on 1.30.

 

100% to 90% in about 10 hours.

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470 Posts

07-22-2019

Canada

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Re:T14 AMD battery drain in standby (Linux)

2021-03-01, 15:23 PM

Hi all,

 

Some notes that may or may not be useful.

 

The image with the updated kernel patch failed e-certification so it's confirmed that doesn't solve the problem. That fits with some of the comments previously. The firmware team are looking at the results.

 

I ran a bunch of tests on my system over the weekend. The summary is:

 

System Notes: EC and BIOS both at 1.30; always-on-USB is enabled (I missed it); secure boot is disabled; sleep is S3 (Linux). I'm running the latest Fedora 33 (just because that's what I have on there).

 

Suspend test #1: Feb26th 15:50 to 20:53 : 50.8 Wh to 46.5 Wh = 0.85 W/hour

Suspend test #2: Feb 26th 20:53 to 27th 07:19: 46.5 Wh to 38.8 Wh = 0.74 W/hour

Power-off test #1 Feb 27th 8:34 to 28th 22:54: 50.3 Wh to 33.9 Wh = 0.43 W/hour

Power-off test #2 Feb 28th 22:54: 33.9 to 33.6 = 0.028 W/hour

 

For me the suspend tests are OK - let me know if you disagree.

 

The first power-off test is a fail - that value is an issue, and matches the reports (and energy certification).

What is fascinating is the 2nd test is great. All I did between the two tests is boot up, grab a screen shot of gnome-power-statistics and powered off again. I've forwarded this on to the firmware team for review, and I'm going to repeat the tests as a sanity check. Somehow it is possible to get really low battery drain with 1.30 - I saw it last night....I just don't know how/why I got there. I'll continue digging and have escalated this internally (again)

 

Mark

 

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42 Posts

02-14-2021

Ukraine

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Re:T14 AMD battery drain in standby (Linux)

2021-03-01, 15:44 PM

@ Barlog wrote:

Disabling LID sensor in BIOS fixed problem with power-off battery drain.

 

BIOS 1.30, T14 Gen1, Windows/Linux dual boot.

let me also test it out this combination. same, only running linux single boot.

 

correction: i have added another 16G RAM stick:

 

```

        Size: 16384 MB
        Form Factor: SODIMM
        Set: None
        Locator: DIMM 0
        Bank Locator: P0 CHANNEL B
        Type: DDR4
        Type Detail: Synchronous Unbuffered (Unregistered)
        Speed: 3200 MT/s
        Manufacturer: Kingston
        Serial Number: C1B4E130
        Asset Tag: Not Specified
        Part Number: 9905744-035.A00G
        Rank: 2
```

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29 Posts

08-19-2020

Germany

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Re:T14 AMD battery drain in standby (Linux)

2021-03-01, 16:05 PM

@ MarkRHPearson wrote:

 

Suspend test #1: Feb26th 15:50 to 20:53 : 50.8 Wh to 46.5 Wh = 0.85 W/hour

Suspend test #2: Feb 26th 20:53 to 27th 07:19: 46.5 Wh to 38.8 Wh = 0.74 W/hour

Power-off test #1 Feb 27th 8:34 to 28th 22:54: 50.3 Wh to 33.9 Wh = 0.43 W/hour

Power-off test #2 Feb 28th 22:54: 33.9 to 33.6 = 0.028 W/hour

 

For me the suspend tests are OK - let me know if you disagree.

 

 

Hi Mark,

 

thanks for your testing. I have comparable suspend values with my T14s, but I would disagree, that these are OK.

 

This weekend I've done a test with a T480 and had much better power consumption in S3 standby:

 

Feb 26th 15:04 (99%) --> S3 sleep --> Mar 1st 09:08 (41%)

It makes ~58% of (19,9+20,6)Wh battery over 66 hours or ~0,35W/hour, which is more then twice better, than the values of the newer T14s.

 

Both laptops have Secure Boot enabled.

T480 even with USB-Always-on enabled.

 

Unfortunately I have noted only percent values, but not energy values from power statistics, but it shouldn't make much difference.

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2 Posts

02-26-2021

Germany

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Re:T14 AMD battery drain in standby (Linux)

2021-03-02, 18:14 PM

Hi all

 

Short update. I updated my T14s to 1.30 two days ago and the battery drain issue in suspend is gone. I lost about 10% in 24h which is totally fine - compared to 40% with 1.29.

Used kernel version is 5.11.2

 

cu

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29 Posts

08-19-2020

Germany

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Re:T14 AMD battery drain in standby (Linux)

2021-03-02, 19:53 PM

Here are my test results with T14s standby (still on 1.29 BIOS):

 

01.03    17:09    85%    46,1 Wh
02.03    20:43    47%    25,7 Wh
---------------------------------
20,4 Wh / 27,5 h = 0,74 W

 

Compared to ~0,35W on T480 it does not look good.

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54 Posts

12-26-2020

Austria

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Re:T14 AMD battery drain in standby (Linux)

2021-03-02, 23:13 PM

@ MarkRHPearson wrote:

Some notes that may or may not be useful.

 

Suspend test #1: Feb26th 15:50 to 20:53 : 50.8 Wh to 46.5 Wh = 0.85 W/hour

Suspend test #2: Feb 26th 20:53 to 27th 07:19: 46.5 Wh to 38.8 Wh = 0.74 W/hour

Power-off test #1 Feb 27th 8:34 to 28th 22:54: 50.3 Wh to 33.9 Wh = 0.43 W/hour

Power-off test #2 Feb 28th 22:54: 33.9 to 33.6 = 0.028 W/hour

 

 

Similar test on X13. v1.29 BIOS (rolled-back after experiencing increased battery drain on v1.30).

 

Laptop is in S3 mode, usb-always-on is disabled.

  • Start: 72%, 34.5 Wh
  • End: 55%, 26.81
  • Duration: ~11.5h

This gives 17% discharge in under 12h! ~0.69 W/hour.

We have some older generation laptops (8th gen Intel) and they are incomparably more efficient.

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5 Posts

02-23-2021

Ukraine

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Re:T14 AMD battery drain in standby (Linux)

2021-03-04, 6:03 AM

I can only add, that my Intel-based T14s had 10% yesterday at 7PM. After 12 hours in suspend I plugged it in and all my work was saved (I haven't recorded the battery level after plugging it in however).

 

My AMD-based X13 with the discharge rate observed so far would fully discharge by 2AM with 100% probability. This is worse than my X270 and even my old X220 (although X220 has a bigger battery indeed).

 

Either AMD is not as energy-efficient as Intel is (even on older-generation Intels, and I don't have any hard data to claim anything here), or the problem is in Lenovo's implementation.

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