Public bug reported: If enabling rtc support: /etc/chrony/chrony.conf: #rtcsync rtcfile /var/lib/chrony/rtc
And restarting chrony into that config $ sudo systemctl restart chrony It will fail to use that: Feb 23 09:53:02 bionic-test chronyd[4216]: Could not open /etc/adjtime : No such file or directory Feb 23 09:53:02 bionic-test chronyd[4216]: Could not open RTC device /dev/rtc : Permission denied One is an apparmor Deny: [ 5756.216096] audit: type=1400 audit(1519379582.153:21): apparmor="DENIED" operation="open" profile="/usr/sbin/chronyd" name="/dev/rtc0" pid=4216 comm="chronyd" requested_mask="w" denied_mask="w" fsuid=0 ouid=0 The access to /etc/adjtime would be ok if it exists. I created it in my setup and it is good now. But the apparmor profile needs to allow rtc. ** Affects: chrony (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1751241 Title: enabling RTC support is blocked by apparmor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/chrony/+bug/1751241/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs