Jetson Nx xavier rtc is not updating time with ubuntu 20.04

Robotics & Edge Computing Jetson & Embedded Systems Jetson Xavier NX
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1

Hi all,
We have developed a custom carrier board designed specifically for the Jetson Xavier NX to suit our application. The board operated flawlessly with Ubuntu 18.04. However, after upgrading to Ubuntu 20.04, we’ve encountered an issue where the system time resets with each reboot.
Our carrier board includes a CR1225 coin cell battery to maintain voltage for the Jetson Xavier NX during power-off conditions. I have attached the schematic for your reference.

rct
rct1482×243 25.7 KB

Thanks in advance for supporting

4

Hi @malakondareddy,

Please refer to discussion in the topic and give it a try:

Regards,

Enrique Ramirez
Embedded SW Engineer at RidgeRun
Contact us: support@ridgerun.com
Developers wiki: https://developer.ridgerun.com
Website: www.ridgerun.com

5

Thanks for reply,
I have tried the above link procedure but still it is not updating the time.
Initially the output of " zcat /proc/config.gz | grep CONFIG_RTC_HCTOSYS_DEVICE " is

CONFIG_RTC_HCTOSYS_DEVICE=“rtc1”
Then we changed rtc1 to rtc0 by building kernal.
However that did not help us.

Please let me know the further steps. Is it possible to join live chat or virtual meeting for easy communication ?

Board : Own carried board (RTC schematic similar to dev kit )
module : Jeston NX xavier.

6

Hi All,
Any update on this?

8

There is no update from you for a period, assuming this is not an issue anymore.
Hence, we are closing this topic. If need further support, please open a new one.
Thanks

Hi malakondareddy,

Please share the current result of the following commands on your board.

$ zcat /proc/config.gz | grep CONFIG_RTC_SYSTOHC_DEVICE
$ timedatectl status
$ systemctl status systemd-timesyncd

And also the full dmesg for further check.