[solved] Power management while running out of battery

re-mind · 2017-05-02 07:58:01

So I have this thinkpad x200s and when the battery runs out it dies.. hard. I would like it to hibernate instead. I have followed the wiki which tells me to add an udev rule.

/etc/udev/rules.d/99-lowbat.rules

# Suspend the system when battery level drops to 5% or lower
SUBSYSTEM=="power_supply", ATTR{status}=="Discharging", ATTR{capacity}=="[0-5]", RUN+="/usr/bin/systemctl hibernate"

It is now addet but I do not know if I need to do anything else. Do I need to activate it or add it to systemctl?

Thank you for reading my question

Last edited by re-mind (2017-05-07 21:06:30)

seth · 2017-05-02 12:19:28

There's a link right below that instructions on the wiki page which tells you how to test rules before loading them.
Follow that and read the next ten lines...

re-mind · 2017-05-07 21:03:48

Thank you for the answer seth

I'm just gonna write up the solution if anyone else needs the same answers. Setting the udev rule is "obviously" not enough. The udev-rule worked fine but Arch did not know where to write to and where to resume from. Therefore I edited the line in grub containing "GRUB_CMDLINE_LINUX_DEFAULT=" and replaced "quiet" with "resume=/dev/sda3" where sda3 is where my swap is located.

sudo nano /etc/default/grub

Then edited /etc/mkinitcpio.conf and added "resume" under hooks AFTER udev.

sudo nano /etc/mkinitcpio.conf

Then rebuilt kernel and grub

mkinitcpio -p linux

grub-mkconfig -o /boot/grub/grub.cfg

Then it worked for me

Last edited by re-mind (2017-05-07 21:04:59)

seth · 2017-05-07 21:08:29

That's a different problem and actually covered by https://wiki.archlinux.org/index.php/Po … ibernation :-P

re-mind · 2017-05-08 07:26:49

seth wrote:

That's a different problem and actually covered by https://wiki.archlinux.org/index.php/Po … ibernation :-P

I had already read that page (and the page that it refers to about kernel parameters) but it did not tell me where to put in the kernel parameters (noob) so I had to go through a whole lot of digging and ended up with a combination of the three. Moreover the page about the udev here does not explain that I need to do the other steps

Arch Linux

#1 2017-05-02 07:58:01

[solved] Power management while running out of battery

#2 2017-05-02 12:19:28

Re: [solved] Power management while running out of battery

#3 2017-05-07 21:03:48

Re: [solved] Power management while running out of battery

#4 2017-05-07 21:08:29

Re: [solved] Power management while running out of battery

#5 2017-05-08 07:26:49

Re: [solved] Power management while running out of battery

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