Export approximate battery levels that devices can use, exported by
the kernel as POWER_SUPPLY_CAPACITY_LEVEL_* values.
This avoids bizarrely accurate values showing up in UIs when we only
have ok/warning levels of accuracy in some cases.
https://bugs.freedesktop.org/show_bug.cgi?id=100359
Those levels will not be used to cover warning levels, but approximate
battery levels that devices can use, exported by the kernel as
POWER_SUPPLY_CAPACITY_LEVEL_* values.
See linux/power_supply.h
https://bugs.freedesktop.org/show_bug.cgi?id=100359
It was added for some workloads, but ill-suited and never really
got traction. Using cgroups to manage the resources of particular
services (using systemd), or something separate like rtkit is
a better bet.
This allows session power managers to do different actions depending on whether the user
is suspending or hibernating. This allows the session policy agent to poke other things
(for instance, the screensaver) even if another process initiated the sleep.
This is based on a patch from Phillip Susi <psusi@cfl.rr.com>, many thanks.
