Difference between revisions of "Real-Time Clock"
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JeremyRand (talk | contribs) (Move RTC content from Talos II Building FAQ) |
JeremyRand (talk | contribs) (Add Ownership section) |
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| + | == Ownership == | ||
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| + | For security reasons, by default, the [[BMC]] owns the RTC; the host has read-only access to the RTC via [[IPMI]]. | ||
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== Setting the hardware real-time clock has no effect == | == Setting the hardware real-time clock has no effect == | ||
Revision as of 04:08, 15 April 2025
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
