Author Topic: How to set hwclock (BMC) to correct date?  (Read 1976 times)

MPC7500

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How to set hwclock (BMC) to correct date?
« on: January 23, 2021, 05:51:45 am »
Hello everyone,

does anyone know how to set / to sync the hwclock?
I'm connected to the internet, but the clock dosen't sync.

Thanks in advance

Borley

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Re: How to set hwclock (BMC) to correct date?
« Reply #1 on: February 25, 2022, 09:56:59 am »
hwclock --set has not worked. I think my system has just been using Gnome location service to grab the network time each time it boots.
Blackbird C1P9S01, CPU 02CY650, 2x 8GB 2666 RAM, 1024GB M.2 SSD, AMD RX 560X, 2U heatsink, 500W SFX PSU, Debian 11

MPC7500

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Re: How to set hwclock (BMC) to correct date?
« Reply #2 on: February 25, 2022, 07:02:05 pm »

Borley

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Re: How to set hwclock (BMC) to correct date?
« Reply #3 on: February 28, 2022, 03:12:09 pm »
"Error: Date and time settings could not be saved" when I try to manually set date and time. Setting NTP servers for synchronization works, however.
Blackbird C1P9S01, CPU 02CY650, 2x 8GB 2666 RAM, 1024GB M.2 SSD, AMD RX 560X, 2U heatsink, 500W SFX PSU, Debian 11

ClassicHasClass

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Re: How to set hwclock (BMC) to correct date?
« Reply #4 on: March 01, 2022, 03:33:58 pm »
I just use NTP (I have a stratum 1 server on the local network).

Borley

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Re: How to set hwclock (BMC) to correct date?
« Reply #5 on: March 25, 2023, 10:12:55 am »
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?
Blackbird C1P9S01, CPU 02CY650, 2x 8GB 2666 RAM, 1024GB M.2 SSD, AMD RX 560X, 2U heatsink, 500W SFX PSU, Debian 11

Corvidae

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Re: How to set hwclock (BMC) to correct date?
« Reply #6 on: March 25, 2023, 01:28:52 pm »
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

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Re: How to set hwclock (BMC) to correct date?
« Reply #7 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...").
Blackbird C1P9S01, CPU 02CY650, 2x 8GB 2666 RAM, 1024GB M.2 SSD, AMD RX 560X, 2U heatsink, 500W SFX PSU, Debian 11

Corvidae

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Re: How to set hwclock (BMC) to correct date?
« Reply #8 on: March 26, 2023, 01:45:30 pm »
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...").

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!