Here is my PR: Fix get_ntpq not working on Slackware and other distros by dnlldl · Pull Request #389 · tribe29/checkmk · GitHub</title
Problem still there in 2.0.0p9. By the way, I don’t think my solution is the most elegant… this should be checked thoroughly by someone with a deeper knowledge of Unix systems, this works for my specific situation on Slackware, but YMMV with other distros.