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How to set hwclock (BMC) to correct date?

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Borley:
A problem is, once the hardware clock does update, it just seems stuck forever on that time and date. Maybe the CMOS battery needs replacing?

Corvidae:
My BMC time was incorrect / not updating when I got my system, it was a while ago but I think this is what I did to get it working:


* I replaced the CMOS battery that came with the system - the voltage was about on the line between being OK and too low, so I'm not sure if that was neccessary, but it didn't hurt.
* I set the time sync method to manual as described here, on the BMC command line.
* I then set the time using hwclock on the BMC command line, and confirmed that it set properly with timedatectl (and that NTP was disabled)
From what I have found, hwclock in a booted system does not work for setting the time. IPMI also didn't work for me, but I might have just been using that incorrectly. Lastly, I keep the BMC disconnected from the network (I use serial to connect to it), not sure if that makes any difference.

Borley:
Thanks, I just replaced the CMOS battery and checked voltages. The original from factory battery was still at 3.1V. The new one was at 3.12V. I'm not sure that makes much of a difference.

So I went through the BMC web interface and what really did it was checking the "Time Owner" property which was left on "BMC". After I changed it to "Both", I was then able to successfully update and save the RTC time.

I rebooted and for the first time in months, haven't had to manually set the system time through desktop settings. We'll see if it keeps up from here on out 👍 (or if it will forever be in stasis at "March 26, 2023, 11:3...").

Corvidae:

--- Quote from: Borley on March 26, 2023, 11:11:26 am ---Thanks, I just replaced the CMOS battery and checked voltages. The original from factory battery was still at 3.1V. The new one was at 3.12V. I'm not sure that makes much of a difference.

So I went through the BMC web interface and what really did it was checking the "Time Owner" property which was left on "BMC". After I changed it to "Both", I was then able to successfully update and save the RTC time.

I rebooted and for the first time in months, haven't had to manually set the system time through desktop settings. We'll see if it keeps up from here on out 👍 (or if it will forever be in stasis at "March 26, 2023, 11:3...").

--- End quote ---

I didn't know about the "Time Owner" setting - that explains why my attempts at setting the clock on the host side have failed. Hopefully your system clock keeps ticking!

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