I've written a udev rule to catch uevent "change" events, with the goal of setting LED user/group/permissions whenever trigger settings are changed. http://unix.stackexchange.com/a/202870/34376 However, I've noticed that a TRIGGER uevent "change" event is generated every time an LED is turned off. E.g. in one terminal: udevadm monitor -p In another terminal: echo 0 > /sys/class/leds/beaglebone:green:usr3/brightness The first terminal shows: KERNEL[15446.374466] change /devices/leds/leds/beaglebone:green:usr3 (leds) ACTION=change DEVPATH=/devices/leds/leds/beaglebone:green:usr3 SEQNUM=39147 SUBSYSTEM=leds TRIGGER=none This behaviour is not ideal, because I really only want this uevent if the trigger really has changed. I presume this is due to these two lines in brightness_store() in led-class.c: if (state == LED_OFF) led_trigger_remove(led_cdev); What would be the recommended way to improve this, so a TRIGGER uevent "change" event is only generated if the trigger is actually reset to 'none' in this scenario? I've noticed this on kernel 3.14.48 running on BeagleBone Black. -- Craig McQueen -- To unsubscribe from this list: send the line "unsubscribe linux-leds" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
