Hi Jeanette, is the "realtime-privileges" package installed? https://www.archlinux.org/packages/community/any/realtime-privileges/ If not, then install it, add your user to the group "realtime", log out and in. If this shouldn't be the issue, is 99-realtime-privileges.conf the last config providing the memlock configuration or does another package follow and override the setting? $ grep memlock /etc/security/limits.d/* /etc/security/limits.d/10-gcr.conf:@users - memlock 1024 /etc/security/limits.d/99-realtime-privileges.conf:@realtime - memlock unlimited A memlock value in /etc/security/limits.conf is null and void, if any package should have "dropped" something counterproductive to /etc/security/limits.d/. An admin needs to check this after _each_ upgrade. Regards, Ralf -- pacman -Q linux{,-rt{-securityink,-cornflower,,-pussytoes}}|cut -d\ -f2 4.20.4.arch1-1 4.19.15_rt12-0 4.19.13_rt10-0 4.19.10_rt8-0 4.18.16_rt9-1