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#1 2018-07-09 21:29:23

ztheoz
Member
Registered: 2018-07-02
Posts: 4

Laptop's battery drains when shutdown

Hi,
I've installed Archlinux on my laptop a few days ago. I've noticed a problem when my laptop is shutdown : I loose battery (between 2% - 5% during a full night).
When my computer is shutdown, I can hear a little noise coming from my computer, so I think that a component is not fully shutdown.

I've got an Acer Swift 1 (SF114-31-P9N8), with the latest kernel (4.17.4-1-ARCH), and I've also installed manjaro, but I've got the same issue.
I've read that it could be because of WoL, but the option doesn't appear in my BIOS, so I think it's not linked.

However, I've found a workaround : when I hit "shutdown' in KDE, the system launch a script that runs the command "halt". Then I just have to press the power button until the computer turns off. I know it's not a good solution, so I'd like to fix this problem using the right way.

I hope someone will be able to help me,
Thanks!

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#2 2018-07-10 11:04:39

fijit
Member
Registered: 2012-07-06
Posts: 19

Re: Laptop's battery drains when shutdown

Two things I would check that might be drawing power
- WoL. Even if there is no bios option, check whether it is enabled for your adaptor https://wiki.archlinux.org/index.php/Wa … figuration
- wake on usb. Look for EHC or XHC in /proc/acpi/wakeup

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#3 2018-07-17 17:54:07

ztheoz
Member
Registered: 2018-07-02
Posts: 4

Re: Laptop's battery drains when shutdown

fijit wrote:

Two things I would check that might be drawing power
- WoL. Even if there is no bios option, check whether it is enabled for your adaptor https://wiki.archlinux.org/index.php/Wa … figuration
- wake on usb. Look for EHC or XHC in /proc/acpi/wakeup

Thanks for the anwser.
I've ran the command cat /proc/acpi/wakeup*, and it gave me :
XHC1      S3    *enabled   pci:0000:00:14.0
BRCM      S0    *disabled
BRC1      S0    *disabled
HDEF      S4    *disabled  pci:0000:00:1b.0
RP01      S4    *disabled  pci:0000:00:1c.0
PXSX      S4    *disabled
RP02      S4    *disabled
PXSX      S4    *disabled
RP03      S0    *disabled  pci:0000:00:1c.2
PXSX      S4    *disabled  pci:0000:02:00.0
RP04      S4    *disabled
PXSX      S4    *disabled
LID0      S4    *enabled   platform:PNP0C0D:00

So I've seen that "XHC1" is enabled, so this might be at the origin of the issue.
But I don't know how to disable, anyone have an idea?
Thanks

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#4 2018-07-18 09:21:29

fijit
Member
Registered: 2012-07-06
Posts: 19

Re: Laptop's battery drains when shutdown

echo "XHC1" > /proc/acpi/wakeup

will toggle it.
Might also be worth checking whether there is a BIOS option for this. There is on my dell laptop.

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#5 2018-07-24 11:20:30

ztheoz
Member
Registered: 2018-07-02
Posts: 4

Re: Laptop's battery drains when shutdown

fijit wrote:
echo "XHC1" > /proc/acpi/wakeup

will toggle it.
Might also be worth checking whether there is a BIOS option for this. There is on my dell laptop.

Sorry for the late reply, but I was on holidays in another country far from my computer.
I've run the command, but it didn't change anything.
But I'm not sure that it's the origin of the issue, as it says that it is active in S3 state, so when the laptop is on standby.
Anyway, I didn't find any option linked to Wake Up on USB in my BIOS.
Thanks !

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