Power

Suspend to disk ​

The configuration is a two step process:

• Configure kernel parameters
• Configure initramfs

Configure kernel parameters ​

On SWAP partition ​

Get the UUID of the SWAP device:

sudo blkid

Edit the file /etc/default/grub by adding the following values to GRUB_CMDLINE_LINUX_DEFAULT (replace swap_device):

resume=UUID=swap_device

Apply the changes with:

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

On SWAP file ​

Consider a swap file at /swapfile. Get swap_device and swap_file_offset by running:

findmnt -no UUID -T /swapfile
filefrag -v /swapfile | awk '{ if($1=="0:"){print substr($4, 1, length($4)-2)} }'

Edit the file /etc/default/grub by adding the following values to GRUB_CMDLINE_LINUX_DEFAULT:

resume=UUID=swap_device resume_offset=swap_file_offset

Apply the changes with:

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

Configure initramfs ​

Edit the file /etc/mkinitcpio.conf by adding resume to HOOKS as follows:

HOOKS=(base udev autodetect modconf block filesystems keyboard resume fsck)

Regenerate the initramfs:

mkinitcpio -P