How to create a callback for “monitor plugged” on an intel graphics?

Question

I\'ve got an eeepc with an intel graphics. I\'d like to hook a script to the event of a monitor plugged via VGA. How to do that?

Answer 1

This other answer is on the right path: you want to listen to DRM events from udev.

I've implemented a Python script that runs some code when either USB devices or external displays are (un)plugged. I'm including below a minimal version of that script (untested):

#!/usr/bin/env python3
import pyudev

def udev_event_received(device):
    ...  # Your code here!

context = pyudev.Context()
monitor_drm = pyudev.Monitor.from_netlink(context)
monitor_drm.filter_by(subsystem='drm')
observer_drm = pyudev.MonitorObserver(monitor_drm, callback=udev_event_received, daemon=False)

observer_drm.start()

# This will prevent the program from finishing:
observer_drm.join()

See also:

• How can I run code whenever a USB device is (un)plugged, without requiring root permissions?
• How can I listen for 'usb device inserted' events in Linux, in Python?
• pyudev documentation - Asynchronous monitoring