Difference between revisions of "Real-Time Clock"
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JeremyRand (talk | contribs) (Add Ownership section) |
JeremyRand (talk | contribs) (→Setting the hardware real-time clock has no effect: Fix code formatting (Pseudo Tor Browser doesn't like grave accents)) |
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== Setting the hardware real-time clock has no effect == | == Setting the hardware real-time clock has no effect == | ||
| − | If | + | If <code>hwclock --systohtc</code> has no effect (i.e. <code>hwclock --get</code> is unchanged), then: |
1. From the BMC console, power off the host | 1. From the BMC console, power off the host | ||
| − | 2. Type | + | 2. Type <code>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</code> (note the capitalization: <code>Host</code>, not <code>HOST</code> as the openbmc github issues tell you!) |
3. Reboot the BMC | 3. Reboot the BMC | ||
4. Power on the host | 4. Power on the host | ||
Revision as of 04:14, 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
