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389 Posts

03-06-2021

Germany

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Re:T14 AMD battery drain in standby (Linux)

2021-05-26, 0:32 AM

@ ikovnatsky wrote:

for me the driver rules all: keyboard/trackpoint/touchpad

 

driver: i8042

 

May 25 16:53:15 thinkpad kernel: input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio3/input/input34

May 25 16:53:16 thinkpad kernel: input: SynPS/2 Synaptics TouchPad as /devices/platform/i8042/serio4/input/input36

May 25 16:53:17 thinkpad kernel: input: TPPS/2 Elan TrackPoint as /devices/platform/i8042/serio4/serio5/input/input37

 

but, why not, let' try.

 

I've tested that and it doesn't make any difference.

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104 Posts

02-14-2021

Ukraine

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Re:T14 AMD battery drain in standby (Linux)

2021-05-26, 8:18 AM

> but as an aside I thought that was a "good thing". As in batteries don't last well if constantly charged

 

maybe that's just me, but sometimes when i read your messages it seems to me that everything we've experiencing here is just the way it should be.

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104 Posts

02-14-2021

Ukraine

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Re:T14 AMD battery drain in standby (Linux)

2021-05-29, 17:18 PM

@Mark_Lenovo may i please ask you/firmware team regarding further steps on s5/s0 issue?

 

because i've got the battery drain same as in 1.29 when laptop powered off or powered on.

 

https://download.lenovo.com/pccbbs/mobiles/r1buj63wd.txt

> - Fixed an issue that Optimize for Linux S5 power consumption problem.

 

would be great to understand what that wording precisely mean, fixing regression from 1.30 or fixing for good?

 

if that meant only fixing regression introduced in 1.30, what are the next steps and how long we would need to wait to fix the issue at all?

 

if that meant to fix for good, i'm afraid that fix failed to deliver expected result.

 

or can you please confirm that drain 1% in 2-3 days is totally expected and engineered result.

 

thanks.

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35 Posts

01-23-2021

Argentina

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Re:T14 AMD battery drain in standby (Linux)

2021-05-29, 19:35 PM

@Mark_Lenovo Any news on S3?

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13 Posts

11-09-2020

United States of America

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Re:T14 AMD battery drain in standby (Linux)

2021-05-30, 5:24 AM

 or can you please confirm that drain 1% in 2-3 days is totally expected and engineered result.

 

@ikovnatsky I believe that's just normal self discharge.

 

I've used TLP/thinkpad_acpi to set start/stop charge thresholds  of 50-60% or so on my Linux thinkpads for a minimum of 10 years now, could be even longer but I can't remember for sure that far back.  This represents at least 4-5 machines, only two of them AMD (T495, T14).  These machines spend most of their life on AC, with short work trips where they actually do get used on battery for a good part of the time.

 

I've always seen them lose a percentage of charge over a few days when left on AC, whether powered on or off.  Once the charge drops to the start threshold, the battery will charge until the stop threshold, practically never registering a cycle.  When on a trip/anticipating the need to use the machine on battery I'll change the stop threshold to something like 90, and in that case I do see cycles increase as expected.

 

I haven't looked deeper into this but I suspect the rate is not fixed, but rather closer to an exponential decay, with the self discharge being a little faster the more charged the battery is.

 

IMO this particular behavior is a non-issue.  Even if the rate is linear we're talking about going from say 70 to 40 in two to three months.

 

On the other hand, the high rate (over 0.7W) of S3 discharge is a practical problem, a regression vs. other/older models, and will (for me at least) become more so once I move closer to a pre-pandemic trip pattern.  So I think this is the major open issue (at least as power is concerned) with 1.32.

 

Minor edit for clarity, also stats: The T14 is about 6 months old and has 4 cycles.  The T495, about 18 months old, has 8.

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104 Posts

02-14-2021

Ukraine

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Re:T14 AMD battery drain in standby (Linux)

2021-05-30, 5:28 AM
thanks, got it, then we wait for s3 issue fix.
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8 Posts

04-07-2019

Estonia

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Re:T14 AMD battery drain in standby (Linux)

2021-05-30, 7:56 AM

This is quite worrying and also disappointing. I love my Thinkpad (keyboard, ports, form, 48GB RAM, all good). But the battery drain is intolerable. I did some tests:

 

Linux:

1. Charge to 50%, leave computer running (right after reboot, no applications open, BIOS (1.32, linux standby), OS: Ubuntu 20.04)

2. 24h later 21% left. Meaning it lost 29% of charge during 24 hours. 

 

Windows:

1. Charge to 50%, leave computer running (right after reboot, no applications open, BIOS (1.32, Win10 standby), OS: Win 10)

2. 24h later 43% left. I'd have expected a bit better but that's acceptable I guess

 

Is there work being done on this or can I myself do anything to improve the situation? 

I travel and work on my laptop. Having good battery is a must. It would be amazing if you could figure it out. Please give Linux some fair treatment and love!

 

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389 Posts

03-06-2021

Germany

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Re:T14 AMD battery drain in standby (Linux)

2021-05-30, 8:06 AM

@ mad_is wrote:

This is quite worrying and also disappointing. I love my Thinkpad (keyboard, ports, form, 48GB RAM, all good). But the battery drain is intolerable. I did some tests:

 

Linux:

1. Charge to 50%, leave computer running (right after reboot, no applications open, BIOS (1.32, linux standby), OS: Ubuntu 20.04)

2. 24h later 21% left. Meaning it lost 29% of charge during 24 hours. 

 

Windows:

1. Charge to 50%, leave computer running (right after reboot, no applications open, BIOS (1.32, Win10 standby), OS: Win 10)

2. 24h later 43% left. I' have expected a bit better but that' acceptable I guess

 

Is there work being done on this or can I myself do anything to improve the situation? 

I travel and work on my laptop. Having good battery is a must. It would be amazing if you could figure it out. Please give Linux some fair treatment and love!

 

 

You cannot test like this.

 

You have to leave Linux, aka S3 in Windows too.

 

( Speaking of this, @MarkRHPearson , that should be called different in BIOS.)

 

What you tested in Windows 10 is S0ix, while you tested S3 in Linux, two different things.

 

And no you cannot help ( unless you are part of the firmware team ;) ) it is a firmware issue.

 

Gabriel

 

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104 Posts

02-14-2021

Ukraine

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Re:T14 AMD battery drain in standby (Linux)

2021-05-30, 8:06 AM

please correct me if i’m wrong.

 

can i state then lenovo acpi/power management was always this way and it had drains even when powered off?

 

this indicates that they had pretty low quality products all their history, no? (or recent)

 

comparing to what apple does, when my work laptop i guess of year 2018 or 2019 did drain in standby/sleep (or how they call it) around 1% in 2-3 days, maybe even less.

 

(to be honest i’m very interested to try it out what dell offers in this regard, dell xps line)

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389 Posts

03-06-2021

Germany

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Re:T14 AMD battery drain in standby (Linux)

2021-05-30, 8:13 AM

@ ikovnatsky wrote:

please correct me if i’m wrong.

 

can i state then lenovo acpi/power management a always this way and it had drains even when powered off?

 

this indicates that they had pretty low quality products all their history, no?

 

comparing to what apple does, when my work laptop i guess of year 2018 or 2019 did drain in standby/sleep (or how they call it) around 1% in 2-3 days, maybe even less.

 

(to be honest i’m very interested to try it out what dell offers i this regard, dell xps line)

 

Is there AMD XPS ?.. I personally won't buy anything with an Intel CPU any time soon :).

 

You cannot compare to Apple, that would be very unfair. Apple can 'add' whatever they wish, in their OS,

they have full access to XYZ vendor documentation and can optimize per unit if they wish.

Also now with their own CPUs, they can optimize even more.

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