Real-Time Clock

Ownership

For security reasons, by default, the BMC owns the RTC; the host has read-only access to the RTC via IPMI.

Setting the hardware real-time clock has no effect

If hwclock --systohtc has no effect (i.e. hwclock --get is unchanged), then:

1. From the BMC console, power off the host

2. Type busctl set-property xyz.openbmc_project.Settings /xyz/openbmc_project/time/owner xyz.openbmc_project.Time.Owner TimeOwner s xyz.openbmc_project.Time.Owner.Owners.Host (note the capitalization: Host, not HOST as the openbmc github issues tell you!)

3. Reboot the BMC

4. Power on the host