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#1 2021-06-11 22:46:08

Allexj
Member
Registered: 2015-07-11
Posts: 62

In my laptop Linux has a bad battery duration compared to Windows

Windows lasts 2 hours more, and since I use a lot my laptop unplugged, I really need to optimize battery more than possible.

I have a Huawei Matebook D 14 2020, AMD Ryzen 5 3500U with integrated Vega GPU. I run the latest linux kernel.

I have tlp installed and running, among with auto-cpufreq, but they don't seem to help much.
I tried using cpupower-gui to manually set powersave and also set max CPU freq to MINIMUM. No differences.

I use powertop in order to monitor battery usage, and this is the output in idle (there's this strange "Display backlight" that consume so much battery..... I don't know if this is a Powertop bug):
https://imgur.com/a/iWwNr1L

I tried using kernel parameters: GRUB_CMDLINE_LINUX="vga=current ivrs_ioapic[4]=00:14.0 ivrs_ioapic[5]=00:00.2 iommu=pt idle=nomwait acpi_backlight=vendor acpi_enforce_resources=lax scsi_mod.use_blk_mq=1 acpi_osi=! acpi_osi='Windows 2015'"
but powertop gives me the same output.

Last edited by Allexj (2021-06-11 22:46:54)

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#2 2021-06-12 10:18:20

Lone_Wolf
Member
From: Netherlands, Europe
Registered: 2005-10-04
Posts: 9,452

Re: In my laptop Linux has a bad battery duration compared to Windows

screen brightness is known to be a significant factor in laptop power usage.

archwiki on TLP wrote:

Features intentionally excluded

    Fan control. See Fan speed control

    Backlight brightness. See Backlight


Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.
Did you use the guided installer ? If yes, I can't help you.

(A works at time B)  && (time C > time B ) ≠  (A works at time C)

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#3 2021-06-12 12:18:58

Allexj
Member
Registered: 2015-07-11
Posts: 62

Re: In my laptop Linux has a bad battery duration compared to Windows

Lone_Wolf wrote:

screen brightness is known to be a significant factor in laptop power usage.

archwiki on TLP wrote:

Features intentionally excluded

    Fan control. See Fan speed control

    Backlight brightness. See Backlight

The weird thing is that if I set the brightness to MINIMUM, Powertop gives always 7W as always, like if decreasing brightness to minimum does not make any difference.... Why?

I also tried some kernel parameters:
acpi_backlight=video consumes 14W according to Powertop
acpi_backlight=vendor, acpi_backlight=native and acpi_backlight=none all consume 7W according to Powertop as usual.


I don't know what to do.

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#4 2021-06-13 17:24:45

Allexj
Member
Registered: 2015-07-11
Posts: 62

Re: In my laptop Linux has a bad battery duration compared to Windows

UPDATE:

I tested a lot of distros via live usb with Powertop, here are the results:

    ArchLinux: 7.5W

    Elementary: 7W

    EndeavourOS xfce: 7.20W

    Fedora GNOME: 7.40W

    Manjaro KDE: 7.30W

    PopOS: 7.40W

    Ubuntu : 6.50W

    Xubuntu: 6.85W

    Lubuntu: 6.40W

    LinuxMint Cinnamon: 4.43W

    LinuxMint XFCE: 5.21W

    Windows: 6.7W

Why? What's special about LinuxMint? How is it possible?

In my ArchLinux I tried TLP, auto-cpufreq, LMT but I still have high power consumption and I have a low battery duration...... so I am wondering how is it possible that LinuxMint live usb has a so low power consumption, so I could have the same results in my ArchLinux

Last edited by Allexj (2021-06-15 20:16:02)

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#5 2021-06-15 20:17:59

Allexj
Member
Registered: 2015-07-11
Posts: 62

Re: In my laptop Linux has a bad battery duration compared to Windows

These are not simply and silly powertop results... I've installed LinuxMint and tried it and it has indeed a FAR better battery duration compared to ArchLinux. I really want to know the "secret key" to have this battery duration also in ArchLinux.

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#6 2021-06-16 12:29:17

Lone_Wolf
Member
From: Netherlands, Europe
Registered: 2005-10-04
Posts: 9,452

Re: In my laptop Linux has a bad battery duration compared to Windows

That could be  a lot of work, but if you're willing to do that start by making the archlinux and linuxmint installations as similar as possible .

So same filesystem format , encryption, boot loader type & settings, DM/WM/DE , services started , applications etc.


Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.
Did you use the guided installer ? If yes, I can't help you.

(A works at time B)  && (time C > time B ) ≠  (A works at time C)

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#7 2021-06-16 14:10:42

Alad
Wiki Admin/IRC Op
From: Bagelstan
Registered: 2014-05-04
Posts: 2,215
Website

Re: In my laptop Linux has a bad battery duration compared to Windows

Try powertop --auto-tune and see what wattage that gives you.


Mods are just community members who have the occasionally necessary option to move threads around and edit posts. -- Trilby

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#8 2021-06-19 21:48:07

Allexj
Member
Registered: 2015-07-11
Posts: 62

Re: In my laptop Linux has a bad battery duration compared to Windows

Alad wrote:

Try powertop --auto-tune and see what wattage that gives you.

If I do that, I have 6W. I also noticed that if I suspend my laptop and then I wake it up, the wattage increases again so I have to manually do powertop --auto-tune again

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