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mrripe
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Posts: 16
Registered: ‎06-20-2018
Location: CH
Views: 477
Message 1 of 9

Thinkpad P51 battery just 2.5 hours

My battery of thinkpad P51 just have around 2.5-3 hours of life when in full charged.

Should not be around 8 hours?

 

Screenshot from 2019-04-08 06-01-09.png

ojciec
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Posts: 18
Registered: ‎11-12-2017
Location: PL
Views: 424
Message 2 of 9

Re: Thinkpad P51 battery just 2.5 hours

Make sure that there are no apps in the background that can drain battery. What are Your CPU and RAM usage? Also, make sure that CPU is inactive when on battery.

If You are using Linux then good luck, both power management and how switchable graphics handeled are garbage on Linux (like almost anything on that OS, at least in my experience.).

mrripe
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Registered: ‎06-20-2018
Location: CH
Views: 415
Message 3 of 9

Re: Thinkpad P51 battery just 2.5 hours

CPU and RAM usage are very low, see screenshot: Screenshot from 2019-04-10 00-16-48.png

 

 

There is not app in background, I close all when I checked.

 

I am using Ubuntu, never hear before that have power managment issue.


I had in past 3 thinkpads, and never had this problem, all with Ubuntu.

ojciec
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Posts: 18
Registered: ‎11-12-2017
Location: PL
Views: 404
Message 4 of 9

Re: Thinkpad P51 battery just 2.5 hours

And what about graphic? Are You using only Intel when on battery?

mrripe
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Registered: ‎06-20-2018
Location: CH
Views: 394
Message 5 of 9

Re: Thinkpad P51 battery just 2.5 hours

I am not sure what you mean. I didn't change anything default. I don't change graphic, I don't touched anything on it. I don't play games or similar. Just for work.
ojciec
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Posts: 18
Registered: ‎11-12-2017
Location: PL
Views: 382
Message 6 of 9

Re: Thinkpad P51 battery just 2.5 hours

So most likely system is using nVidia graphic instead of Intel. Google how to switch which card Linux is using or simply turn it off completely in BIOS.

mrripe
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Registered: ‎06-20-2018
Location: CH
Views: 372
Message 7 of 9

Re: Thinkpad P51 battery just 2.5 hours

Seem that is not nVidia: https://ibb.co/QYZLQ1J

As I remember I have two choice for graphic card when I installed Ubuntu; one proprietary (I think nVidia and another one, Intel as you mention). I choose Intel, seem. See screenshot: https://ibb.co/QYZLQ1J

 

Disable graphic in bios sound bad solution... I remember that without graphic card, the screen looks ugly, I have 4K.

ojciec
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Posts: 18
Registered: ‎11-12-2017
Location: PL
Views: 354
Message 8 of 9

Re: Thinkpad P51 battery just 2.5 hours

As i said, try to google it on Ubuntu/Linux forums. Even if Linux is using only Intel graphic it doesn't mean that nVidia chip is in sleep - as i said, Linux is very poor in power management departament, especially in case of switchable graphics. 

 

If You turn off nVidia card in BIOS everyhing will look the same if You have configured everything (drivers etc) to use Intel graphic. No matter which display You have.

But hey, this is only my suggestion so we can troubleshoot Your battery problems, do whatever You want.

mrripe
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Posts: 16
Registered: ‎06-20-2018
Location: CH
Views: 348
Message 9 of 9

Re: Thinkpad P51 battery just 2.5 hours

Thanks for your help and tips, I appreciate. I posted here: https://askubuntu.com/questions/1133223/thinkpad-p51-battery-life-2-5-hours

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