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