<html> <head> <meta content="text/html; charset=utf-8" http-equiv="Content-Type"> </head> <body bgcolor="#FFFFFF" text="#000000"> <div class="moz-cite-prefix">On 12/29/2014 08:16 PM, Larry Harmon wrote: </div> <blockquote cite="mid:78A47A9F25224F4785BDE100564E22AB6F34426C@Thrud.TurningTechnologies.local" type="cite"> <o:p></o:p> I am using a simple shell script, started by system, to set LEDs on a Marvell Armada 370 plug.<o:p></o:p> The script uses a while loop with a "sleep 30" line </blockquote> Hmm somehow using a script ( and a type service unit ) to accomplish this does not sound right to me and I'm pretty sure greg k-h has the correct way of achieving this but did you try fiddling with module options /etc/modprobe.d/<module>.conf options foo bar Or find the trigger cat /sys/class/leds/<foo>-led/trigger Create an tmpfile /etc/tmpfiles.d/<foo>-led.conf w /sys/class/leds/<foo>-led/trigger - - - - <the trigger to be used> systemd-tmpfiles --create <foo>-led.conf And try that instead of writing a script to accomplish this? ( This might be a bug in the kernel/driver if this is not working correctly or if you cant "tweak it" it with something like the above ) JBG </body> </html>