2011/9/8 Sérgio Basto <sergio(a)serjux.com&gt;: I don't think you need to force it. It actually does run but because it exits with a non-zero error level systemctl thinks something went wrong. I'm not sure exactly what "exit ${1:-128}" is supposed to accomplish and I'm not a bash expert. Looking a a reference[1], it appears to mean that if $1 doesn't exist or is null, then "128" is substituted. Since I think akmods is called without an additional options, $1 is indeed unset. I simply changed the "128" to "0" and it fixes the problem but I have no idea as to the appropriateness of that fix. I'm sure the original author, Thorsten Leemhuis (from the script header), had some reason for causing it to exit with that way, I'm just not sure what it is. Richard [1] http://www.gnu.org/s/bash/manual/bash.html#Shell-Parameter-Expansion