Daemon Behaviour

The daemon works by using a stack of "states" for the LED, various states can supersede other states, the stack order is as follows;

LED_PATTERN_OVERHEAT, engaged when the CPU temp goes above TEMP_ALARM as defined in the config file LED_PATTERN_OFFLINE, engaged when the system goes offline LED_PATTERN_SECURITY, engaged when there’s a security update available LED_PATTERN_UPDATES, engaged when updates are available LED_PATTERN_MESSAGES, engaged when messages are waiting LED_PATTERN_STATIC, engaged when there are no other items in the stack above it, and a default colour is set, and the default pattern is LED_PATTERN_STATIC LED_PATTERN_OFF, engaged when no other patterns are in the stack

For everything to work re: updates you will need update-notifier installed.