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79 Posts

12-26-2020

Austria

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Re:T14 AMD battery drain in standby (Linux)

2021-03-06, 7:24 AM

@ MarkRHPearson wrote:

I was going to run another test BIOS from the firmware team over the weekend but unfortunately it has bricked my . I' got to figure getting my hands on a new system :/ Not a good Friday...

 

That's unfortunate... Could you request a Pomona clip and pre-configured hardware flasher? This way you can recover from any "bad" BIOS/EC combination in a matter of minutes (depends on how quickly you can remove the bottom cover and access the chip).

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5 Posts

11-02-2020

Russian Federation

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Re:T14 AMD battery drain in standby (Linux)

2021-03-06, 9:25 AM

As mentioned above, it has smth to do with the lid sensor.

An interesting observation from reddit user

https://www.reddit.com/r/pop_os/comments/l7ah9o/update_power_drain_on_power_off/

No battery drain after shutdown if lid is opened.

Didn't test it myself as for me battery drain (power off) was solved by reverting to bios 1.29, kernel version 5.6.0-1048 (ubuntu 20.04.02)

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4 Posts

03-04-2021

Czech Republic

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Re:T14 AMD battery drain in standby (Linux)

2021-03-06, 9:40 AM

Hi,

 

here are my observations for power drain in POWER-OFF state. My laptop is T14 (20UE-S2WA00, Ryzen 7 Pro 4750U, 32 GB RAM) with Fedora 33, BIOS version 1.30. My workflow is as follow: I work with laptop connected to USB-C docking station and external monitor. At evening I power-off laptop and put it in my laptop case (laptop is fully charged according to Gnome). At morning I have these battery state (about 14 hours later):

 

1) In BIOS I have "USB Always-on" turned ON and "LID Sensor" turned ON, then I have about 84% of battery

 

2) In BIOS I have "USB Always-on" turner ON and "LID Sensor" turned OFF, then I have about 96% of battery

 

3) In BIOS I have "USB Always-on" turned OFF and "LID Sensor" turned OFF, then I have "fully charded" battery

 

I read battery state from Gnome "notification area" (upper right corner) so I don't have exact numbers. If you can provide the Linux command than I can provide more precise numbers. Of course it can be coincidence because I tested these settings just one-time each. I will test LID Sensor ON this night and see if power consumption return.

 

Is there a way to export all BIOS settings so we can compare it? I thought that maybe it's some combination of settings that make this state happen. Maybe some "wake-up" options like wake on LAN or something?

 

Does anyone try to reset BIOS to default settings? Maybe some legacy settings from older BIOS get "stucked"? I will try to reset my BIOS this night and see if something change.

 

I'm sorry I can't help with S3 state, because I don't use it much (just for few minutes to move between places).

 

EDIT: I power-off my laptop with closed lid (it's connected to docking station). But I'm sure that it's turned-off - first its red LED in ThinkPad logo is turned off and second when I turn computer on then it ask me for password (i have encrypted HDD). I don't have Windows on my machine, pure Linux (kernel 5.10.19-200.fc33.x86_64 but I don't think it has context with power off power drain).

 

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40 Posts

08-19-2020

Germany

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  • Message 144 of 383

Re:T14 AMD battery drain in standby (Linux)

2021-03-06, 11:29 AM

@ Smurv wrote:

 

I read battery state from Gnome "notification area" (upper right corner) so I don' have exact numbers. If you can provide the Linux command than I can provide more precise numbers. Of course it can be coincidence because I tested these settings just one-time each. I will test LID Sensor ON this night and see if power consumption return.

 

 

I'm using this one:

 

upower -i /org/freedesktop/UPower/devices/battery_BAT0 | sed 's/^[ \t]*//' | grep -E 'updated|energy:|percentage'

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4 Posts

03-04-2021

Czech Republic

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  • Message 145 of 383

Re:T14 AMD battery drain in standby (Linux)

2021-03-06, 16:45 PM

@ Iluha wrote:

I' using this one:

 

upower -i /org/freedesktop/UPower/devices/battery_BAT0 | sed '/^[ \]*//' | grep -E '|energy:|percentage'

 

Thank you for command. Today I tested S3 sleep as I was away from my computer. Computer "slept" from 12:30 to 17:30 (about 5 hours) and lost 10% of battery. "USB Always on" was disabled, "LID sensor" enabled.

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79 Posts

02-14-2021

Ukraine

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Re:T14 AMD battery drain in standby (Linux)

2021-03-07, 10:04 AM

kernel: 5.11.1

lid sensor: disabled

state: powered off

 

wednesday: 3/3 18:00; battery charge: 94%

sunday: 3/7 12:00; battery charge: 92%

 

not sure if there's just discrepancy in sensors calculations or just when i powered on laptop without ac it just went to 92%.

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4 Posts

03-04-2021

Czech Republic

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Re:T14 AMD battery drain in standby (Linux)

2021-03-07, 11:18 AM

I can confirm that POWER OFF discharge has something to do with LID sensor:

 

LID sensor: enabled

USB always on: disabled

state: powered off

 

Saturday: 3/6 19:30; battery charge: 100%

Sunday: 3/7 12:15; battery charge: 85%

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31 Posts

09-08-2020

Germany

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  • Message 148 of 383

Re:T14 AMD battery drain in standby (Linux)

2021-03-09, 12:01 PM

So just to sum up the previous findings (please correct me if I'm wrong).

 

Regarding the standby

  • All T14 AMD models are in principle affected by the abnormal battery drain in standby
  • Some T14s AMD machines suffer from that as well, but some are not affected at all
  • As of now there is no known workaround to prevent this bug

 

Regarding the power off state

  • Battery drain when powered off is a bug that was introduced with the BIOS version 1.30 and affects
    both T14 AMD and T14s AMD models.
  • Downgrading to the BIOS version 1.29 (or older) solves the issue on T14 AMD (on T14s AMD too?)
  • Turning off the lid sensor in BIOS seems to be a workaround that helps with BIOS version 1.30
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79 Posts

02-14-2021

Ukraine

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Re:T14 AMD battery drain in standby (Linux)

2021-03-09, 12:19 PM

i think @jd_user mentioned that x13 and p14s with amd chips are also effected. 

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29 Posts

12-04-2020

Portugal

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  • Message 150 of 383

Re:T14 AMD battery drain in standby (Linux)

2021-03-09, 12:20 PM

P14S is also affected!

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