I'm guessing you have the rtcsync option enabled in chrony.conf. That probably is what is doing it.
-Dustin On Sat, Feb 22, 2020 at 7:15 PM Bill Unruh <un...@physics.ubc.ca> wrote: > > If I run chronyc, I get the following from hwclock > > [root]>hwclock --verbose > hwclock from util-linux 2.33.2 > System Time: 1582419894.572200 > Trying to open: /dev/rtc0 > No usable clock interface found. > hwclock: Cannot access the Hardware Clock via any known method. > > Does chronyd purposely block access to the hardware clock? > > cat /sys/class/rtc/rtc0/time > does give the rtc time as does the date file. So the hardware clock is > running. > Doing an strace on hwclock while chrony is running gives > openat(AT_FDCWD, "/dev/rtc0", O_RDONLY) = -1 EBUSY (Device or resource busy) > > so I presume that it is chrony that is blocking rtc0. > > Is that on purpose? Or could it be opened when chronyd wants to read or write > the rtc, and closed otherwise. (after all, after the first millisecond, chrony > does not use the hardware clock, except with explicit reads) > > > William G. Unruh __| Canadian Institute for|____ Tel: +1(604)822-3273 > Physics&Astronomy _|___ Advanced Research _|____ Fax: +1(604)822-5324 > UBC, Vancouver,BC _|_ Program in Cosmology |____ un...@physics.ubc.ca > Canada V6T 1Z1 ____|____ and Gravity ______|_ www.theory.physics.ubc.ca/ > > -- > To unsubscribe email chrony-dev-requ...@chrony.tuxfamily.org with > "unsubscribe" in the subject. > For help email chrony-dev-requ...@chrony.tuxfamily.org with "help" in the > subject. > Trouble? Email listmas...@chrony.tuxfamily.org. > -- To unsubscribe email chrony-dev-requ...@chrony.tuxfamily.org with "unsubscribe" in the subject. For help email chrony-dev-requ...@chrony.tuxfamily.org with "help" in the subject. Trouble? Email listmas...@chrony.tuxfamily.org.