#Hammock: A power optimisation framework for Linux Mobile devices

• Manage app lifetime
• Suspend background applications
• Permissions integration to stay awake, run in background etc
• Push notifications

Hammock currently only supports Phosh on postmarketOS, with the following patches being required:

• https://gitlab.freedesktop.org/calebccff/dbus/-/commit/9c229750e5da68f379b987fbea86022d59e21124
• https://gitlab.gnome.org/calebccff/phoc/-/commit/2a5068cadf0667fae8a87378ebeb6c96187741a6

It will configure a cgroup per application and use app state tracking via Wayland to freeze apps that aren't in focus. See the example configuration docs/config.default.yaml for more information.

#Requirements

• cgroups
• tinydm

#Development Requirements

• rust

#Development

1. Run git submodule init and git submodule update to load the vendor dependencies
2. Enable cgroups. On Alpine Linux or postmarketOS run: doas /etc/init.d/cgroups start && doas rc-update add cgroups
3. Change ownership for tinydm in cgroup: chown -R <user>:<user> /sys/fs/cgroup/unified/tinydm

#TODO

• Remove all suspend handling code (see elogind commit)