Skip to content

Latest commit

 

History

History
56 lines (39 loc) · 1.71 KB

README.md

File metadata and controls

56 lines (39 loc) · 1.71 KB
Raw

Hibernation Control

⚠️

As of now, this little tool only works on Ubuntu. There is a lot of hard-coded paths, and it will override the Ubuntu's standard swapfile.

Eventually, I might add some more configuration options.

⚠️

Usage

cargo build --release
sudo ./target/release/hibernation-control enable

Features

  • Set up a swapfile of appropriate size (2 time the RAM)
  • Configure GRUB to use the swapfile to resume
  • Update grub and initramfs
  • Configure systemd to hibernate when closing the lid when using battery power

FAQ

Hibernate works but suspend-then-hibernate doesn't, why?

systemd has changed the behaviour for suspend-than-hibernate in 252, but it has been reverted in 255. So HibernateDelaySec will have different behaviour depending on your current version.

See systemd/systemd#25269 and systemd/systemd#25356

From systemd 252 release notes:

When performing suspend-then-hibernate, the system will estimate the discharge rate and use that to set the delay until hibernation and hibernate immediately instead of suspending when running from a battery and the capacity is below 5%.

From systemd 255 release notes:

systemd-sleep 'HibernateDelaySec=' setting is changed back to pre-v252's behaviour, and a new 'SuspendEstimationSec=' setting is added to provide the new initial value for the new automated battery estimation functionality. If 'HibernateDelaySec=' is set to any value, the automated estimate (and thus the automated hibernation on low battery to avoid data loss) functionality will be disabled.

TODO

  • disable command
  • EFI configuration
  • Release binary on github