Na página hwclock
man no RHEL 4.6:
This mode (we'll call it "11 minute mode") is off until something turns it on. The ntp
daemon xntpd is one thing that turns it on. You can turn it off by running
anything, including hwclock --hctosys, that sets the System Time the old fashioned way.
To see if it is on or off, use the command adjtimex --print and look at the value of
"status". If the "64" bit of this number (expressed in binary) equal to 0, 11 minute mode
is on. Otherwise, it is off.
Então, pela virtude de você estar executando hwclock --set
, você provavelmente desativou. Da mesma forma, você pode verificar a saída do adjtimex --print
para confirmar.