diff -up chrony-3.2/doc/chrony.conf.man.in.timestamping chrony-3.2/doc/chrony.conf.man.in --- chrony-3.2/doc/chrony.conf.man.in.timestamping 2017-09-15 10:17:41.000000000 +0200 +++ chrony-3.2/doc/chrony.conf.man.in 2017-09-19 13:52:59.544187046 +0200 @@ -3201,13 +3201,12 @@ timestamping. If the server or peer supp be enabled by the \fBxleave\fP option in the \fBserver\fP or the \fBpeer\fP directive. .sp -This directive is supported on Linux 3.19 and newer. The NIC must support HW +This directive is supported on Linux. The NIC must support HW timestamping, which can be verified with the \fBethtool \-T\fP command. The list of capabilities should include \fISOF_TIMESTAMPING_RAW_HARDWARE\fP, \fISOF_TIMESTAMPING_TX_HARDWARE\fP, and \fISOF_TIMESTAMPING_RX_HARDWARE\fP. Receive filter \fIHWTSTAMP_FILTER_ALL\fP, or \fIHWTSTAMP_FILTER_NTP_ALL\fP, is necessary for -timestamping of received packets. Timestamping of packets received from bridged -and bonded interfaces is supported on Linux 4.13 and newer. When \fBchronyd\fP is +timestamping of received packets. When \fBchronyd\fP is running, no other process (e.g. a PTP daemon) should be working with the NIC clock. .sp