uConsole-sleep

uConsole Sleep service package

This service is built on Ubuntu 22.04 and Python.

It detects power key events to turn the screen on and off. Initially, I used a polling loop for event detection, but to reduce CPU load, I switched to using epoll.

Whenever the screen turns off for any reason (e.g., screensaver, desktop lock, sleep mode), the service detects the screen-off state and lowers the CPU’s maximum frequency to the minimum while also turning off the built-in keyboard’s power and wakeup trigger.

(I also tried changing the CPU governor to powersave, but I noticed a slight delay when switching.)

Similarly, I initially used a polling loop to detect screen-off events, but to reduce CPU load, I switched to using inotify.

The service consists of two background processes:

• sleep-remap-powerkey /usr/local/bin/sleep_remap_powerkey Detects power key events and controls the screen power.
• sleep-power-control /usr/local/bin/sleep_power_control Manages power-saving operations based on screen status.

More Details on forum.clockworkpi.com