reComputer Industrial J4012 rtc not functioning after power loss

Products & Technology
,
1

Hi all,

For the reComputer Industrial J4012 there is already an RTC installed on the board, together with JetPack 6.0 this should work without any extra configuration. However, sometimes after a reboot (especially if the power cable was disconnected) synchronization with the RTC fails:

$ sudo hwclock -v
hwclock from util-linux 2.37.2
System Time: 1751974806.521236
Trying to open: /dev/rtc0
Using the rtc interface to the clock.
Last drift adjustment done at 1751904326 seconds after 1969
Last calibration done at 1751904326 seconds after 1969
Hardware clock is on UTC time
Assuming hardware clock is kept in UTC time.
Waiting for clock tick...
hwclock: select() to /dev/rtc0 to wait for clock tick timed out
...synchronization failed

This persists even after waiting for five minutes. What could be the cause of this and can this be fixed? The battery seems to be properly installed and this issue does not always occur.

2

Hi there,

So Captain obvious here, LOL, what about the battery, is it fresh?
I have seen this Power question thing on here before too. Give it a good visual inspection, be sure no loose mobo screws also, Maybe reseat the battery. I think the grounding needs to be solid too.

HTH
GL :slight_smile: PJ :v:

1 Like
3

Thank you for your reply @PJ_Glasso battery is definitely fresh. We have this issue occur with pretty much all the j4012 devices here. Battery seems pretty tightly in its place, also reseating the battery for each device we get in is sadly unfeasible.

1 Like