/etc/pm/config.d
The files in this directory are evaluated in C sort order. These
files can be provided by individual packages outside of pm-utils.
If a global configuration variable is set, the value set to will be
appended to the previous value. If any other variable is set, it
will be ignored. The syntax is simply: VAR_NAME = value. See the
CONFIGURATION VARIABLES section for valid variables defined by
pm-utils. External packages can define others, see their respective
documentation for more information.
Os ganchos para o estado de energia são colocados em
/usr/lib/pm-utils/power.d
distribution / package provided hooks
/etc/pm/power.d
hooks added by the system administrator
Hooks in /etc/pm/ take precedence over those in /usr/lib/pm-utils/, so the system administrator can override the defaults provided by the distribution.
Por exemplo, verifique este link