| by Pavlos

systemd suspend/resume script

Had a question the other day; a friend’s laptop would lose the trackpad after resume so his solution was to insert the module manually. Well, systemd has systemd-suspend.service which can handle those events. Details in man systemd-suspend.service

Place a script in /lib/systemd/system-sleep/ and make it executable. Any scripts in that directory will be called upon suspend (passing the parameter pre) and will be called again upon resume (passing the parameter post.) A sample script:

#!/bin/sh
   if [ "${1}" = "pre" ]; then
   # about to suspend …
   echo "suspend event at $(date)…" >  /tmp/suspend_test
 elif [ "${1}" = "post" ]; then
   # about to resume … 
   echo "resume event at $(date) …" >> /tmp/suspend_test
 fi

Now, my keyboard backlight settings get saved and restored correctly on suspend/resume.

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