Xavier NX Module reboots after short period of time

Sometimes on our custom carrier board, an already booted Xavier NX module will reboot over and over again. There does not seem to be a correlation between the module being more heavily used and this occuring.

Using tuptime, the reboots seem to happen very rapidly and still stop eventually (see snippet below)

No.             Startup Date                                        Uptime            Shutdown Date   End                                      Downtime491   08:22:49 PM 10/13/2022           11 hours, 12 minutes and 12 seconds   07:35:01 AM 10/14/2022   BAD                      2 minutes and 17 seconds
492   07:37:18 AM 10/14/2022              1 hour, 2 minutes and 42 seconds   08:40:00 AM 10/14/2022   BAD                       1 minute and 33 seconds
493   08:41:33 AM 10/14/2022                                     6 seconds   08:41:39 AM 10/14/2022   BAD                       2 minutes and 0 seconds
494   08:43:39 AM 10/14/2022            4 hours, 16 minutes and 23 seconds   01:00:02 PM 10/14/2022   BAD                      4 minutes and 13 seconds
495   01:04:15 PM 10/14/2022                                    46 seconds   01:05:01 PM 10/14/2022   BAD                                    38 seconds
496   01:05:39 PM 10/14/2022                                     6 seconds   01:05:45 PM 10/14/2022   BAD                      3 minutes and 34 seconds
497   01:09:19 PM 10/14/2022                                    41 seconds   01:10:00 PM 10/14/2022   BAD                       1 minute and 43 seconds
498   01:11:43 PM 10/14/2022                                     6 seconds   01:11:49 PM 10/14/2022   BAD                       1 minute and 15 seconds
499   01:13:04 PM 10/14/2022                                     6 seconds   01:13:10 PM 10/14/2022   BAD                       1 minute and 24 seconds
500   01:14:34 PM 10/14/2022                                    27 seconds   01:15:01 PM 10/14/2022   BAD                       1 minute and 14 seconds
501   01:16:15 PM 10/14/2022                                     6 seconds   01:16:21 PM 10/14/2022   BAD                      2 minutes and 35 seconds
502   01:18:56 PM 10/14/2022                        1 minute and 5 seconds   01:20:01 PM 10/14/2022   BAD                                    21 seconds
503   01:20:22 PM 10/14/2022                                     6 seconds   01:20:28 PM 10/14/2022   BAD                                    45 seconds
504   01:21:13 PM 10/14/2022                                     6 seconds   01:21:19 PM 10/14/2022   BAD                                    25 seconds
505   01:21:44 PM 10/14/2022                                     6 seconds   01:21:50 PM 10/14/2022   BAD                       1 minute and 59 seconds
506   01:23:49 PM 10/14/2022                                     6 seconds   01:23:55 PM 10/14/2022   BAD                       1 minute and 18 seconds
507   01:25:13 PM 10/14/2022                                     6 seconds   01:25:19 PM 10/14/2022   BAD                       1 minute and 37 seconds
508   01:26:56 PM 10/14/2022                                     6 seconds   01:27:02 PM 10/14/2022   BAD                       1 minute and 37 seconds
509   01:28:39 PM 10/14/2022                                     6 seconds   01:28:45 PM 10/14/2022   BAD                       1 minute and 27 seconds
510   01:30:12 PM 10/14/2022                                     6 seconds   01:30:18 PM 10/14/2022   BAD                      3 minutes and 37 seconds
511   01:33:55 PM 10/14/2022                        1 minute and 6 seconds   01:35:01 PM 10/14/2022   BAD                                    44 seconds
512   01:35:45 PM 10/14/2022                      4 minutes and 16 seconds   01:40:01 PM 10/14/2022   BAD                       1 minute and 34 seconds
513   01:41:35 PM 10/14/2022                                     6 seconds   01:41:41 PM 10/14/2022   BAD                       1 minute and 38 seconds
514   01:43:19 PM 10/14/2022                       1 minute and 43 seconds   01:45:02 PM 10/14/2022   BAD                       1 minute and 49 seconds
515   01:46:51 PM 10/14/2022                      8 minutes and 10 seconds   01:55:01 PM 10/14/2022   BAD                      2 minutes and 25 seconds
516   01:57:26 PM 10/14/2022                                     6 seconds   01:57:32 PM 10/14/2022   BAD                       1 minute and 47 seconds
517   01:59:19 PM 10/14/2022                                    42 seconds   02:00:01 PM 10/14/2022   BAD                      5 minutes and 12 seconds
518   02:05:13 PM 10/14/2022                                     6 seconds   02:05:19 PM 10/14/2022   BAD                       1 minute and 55 seconds
519   02:07:14 PM 10/14/2022                                     6 seconds   02:07:20 PM 10/14/2022   BAD                       2 minutes and 3 seconds
520   02:09:23 PM 10/14/2022                                    37 seconds   02:10:00 PM 10/14/2022   BAD                      4 minutes and 49 seconds
521   02:14:49 PM 10/14/2022                                    12 seconds   02:15:01 PM 10/14/2022   BAD                       1 minute and 52 seconds
522   02:16:53 PM 10/14/2022                                     6 seconds   02:16:59 PM 10/14/2022   BAD                       2 minutes and 3 seconds
523   02:19:02 PM 10/14/2022                                    58 seconds   02:20:00 PM 10/14/2022   BAD                        1 minute and 3 seconds
524   02:21:03 PM 10/14/2022                      3 minutes and 58 seconds   02:25:01 PM 10/14/2022   BAD                       1 minute and 37 seconds
525   02:26:38 PM 10/14/2022                      3 minutes and 23 seconds   02:30:01 PM 10/14/2022   BAD                        1 minute and 0 seconds
526   02:31:01 PM 10/14/2022                                     6 seconds   02:31:07 PM 10/14/2022   BAD                      3 minutes and 36 seconds
527   02:34:43 PM 10/14/2022                                    18 seconds   02:35:01 PM 10/14/2022   BAD                       1 minute and 50 seconds
528   02:36:51 PM 10/14/2022                                     6 seconds   02:36:57 PM 10/14/2022   BAD                       1 minute and 49 seconds
529   02:38:46 PM 10/14/2022                       1 minute and 15 seconds   02:40:01 PM 10/14/2022   BAD                                    48 seconds
530   02:40:49 PM 10/14/2022           17 hours, 34 minutes and 12 seconds   08:15:01 AM 10/15/2022   BAD                      2 minutes and 29 seconds
531   08:17:30 AM 10/15/2022                                     7 seconds   08:17:37 AM 10/15/2022   BAD    1 day, 22 hours, 47 minutes and 34 seconds
532   07:05:11 AM 10/17/2022                                     6 seconds   07:05:17 AM 10/17/2022   BAD                      7 minutes and 36 seconds
533   07:12:53 AM 10/17/2022                       2 minutes and 7 seconds   07:15:00 AM 10/17/2022   BAD                      4 minutes and 18 seconds
534   07:19:18 AM 10/17/2022                                    43 seconds   07:20:01 AM 10/17/2022   BAD                      2 minutes and 58 seconds
535   07:22:59 AM 10/17/2022                                     6 seconds   07:23:05 AM 10/17/2022   BAD                        1 minute and 4 seconds
536   07:24:09 AM 10/17/2022                                     6 seconds   07:24:15 AM 10/17/2022   BAD                     56 minutes and 52 seconds
537   08:21:07 AM 10/17/2022                                     6 seconds   08:21:13 AM 10/17/2022   BAD                     35 minutes and 18 seconds
538   08:56:31 AM 10/17/2022                                     6 seconds   08:56:37 AM 10/17/2022   BAD                     16 minutes and 32 seconds
539   09:13:09 AM 10/17/2022            2 hours, 36 minutes and 52 seconds   11:50:01 AM 10/17/2022   BAD                      4 minutes and 53 seconds
540   11:54:54 AM 10/17/2022                      50 minutes and 8 seconds   12:45:02 PM 10/17/2022   BAD                      5 minutes and 10 seconds
541   12:50:12 PM 10/17/2022                      9 minutes and 49 seconds   01:00:01 PM 10/17/2022   BAD                                    29 seconds
542   01:00:30 PM 10/17/2022            3 hours, 20 minutes and 25 seconds   04:20:55 PM 10/17/2022    OK                                    20 seconds
543   04:21:15 PM 10/17/2022                                     5 seconds   04:21:20 PM 10/17/2022   BAD                      3 minutes and 54 seconds
544   04:25:14 PM 10/17/2022                      6 minutes and 43 seconds   04:31:57 PM 10/17/2022    OK                                    16 seconds
545   04:32:13 PM 10/17/2022                                     6 seconds   04:32:19 PM 10/17/2022   BAD                      2 minutes and 34 seconds
546   04:34:53 PM 10/17/2022                                     8 seconds   04:35:01 PM 10/17/2022   BAD                      2 minutes and 53 seconds
547   04:37:54 PM 10/17/2022                       2 minutes and 8 seconds   04:40:02 PM 10/17/2022   BAD                      3 minutes and 28 seconds
548   04:43:30 PM 10/17/2022                       1 minute and 32 seconds   04:45:02 PM 10/17/2022   BAD                                    33 seconds
549   04:45:35 PM 10/17/2022                        1 minute and 7 seconds   04:46:42 PM 10/17/2022    OK                                    24 seconds
550   04:47:06 PM 10/17/2022                       1 minute and 44 seconds   04:48:50 PM 10/17/2022    OK                                    22 seconds
551   04:49:12 PM 10/17/2022                      5 minutes and 49 seconds   04:55:01 PM 10/17/2022   BAD                      4 minutes and 13 seconds
552   04:59:14 PM 10/17/2022                                    48 seconds   05:00:02 PM 10/17/2022   BAD                       1 minute and 44 seconds
553   05:01:46 PM 10/17/2022                      5 minutes and 59 seconds   05:07:45 PM 10/17/2022    OK                                    22 seconds
554   05:08:07 PM 10/17/2022                      6 minutes and 54 seconds   05:15:01 PM 10/17/2022   BAD                      2 minutes and 38 seconds
555   05:17:39 PM 10/17/2022                                     5 seconds   05:17:44 PM 10/17/2022   BAD                       1 minute and 19 seconds
556   05:19:03 PM 10/17/2022                                     6 seconds   05:19:09 PM 10/17/2022   BAD                        1 minute and 0 seconds
557   05:20:09 PM 10/17/2022                                     6 seconds   05:20:15 PM 10/17/2022   BAD                                    48 seconds
558   05:21:03 PM 10/17/2022                                     6 seconds   05:21:09 PM 10/17/2022   BAD                                    45 seconds
559   05:21:54 PM 10/17/2022                                     6 seconds   05:22:00 PM 10/17/2022   BAD                         1 minute and 1 second
560   05:23:01 PM 10/17/2022                                     6 seconds   05:23:07 PM 10/17/2022   BAD                                    50 seconds
561   05:23:57 PM 10/17/2022                                     5 seconds   05:24:02 PM 10/17/2022   BAD                                    55 seconds
562   05:24:57 PM 10/17/2022                                     6 seconds   05:25:03 PM 10/17/2022   BAD                       1 minute and 23 seconds
563   05:26:26 PM 10/17/2022                     33 minutes and 35 seconds   06:00:01 PM 10/17/2022   BAD                      4 minutes and 47 seconds
564   06:04:48 PM 10/17/2022                     10 minutes and 13 seconds   06:15:01 PM 10/17/2022   BAD                       2 minutes and 5 seconds
565   06:17:06 PM 10/17/2022                                     6 seconds   06:17:12 PM 10/17/2022   BAD                      2 minutes and 26 seconds
566   06:19:38 PM 10/17/2022                                    23 seconds   06:20:01 PM 10/17/2022   BAD                                    58 seconds
567   06:20:59 PM 10/17/2022                                     6 seconds   06:21:05 PM 10/17/2022   BAD                                    55 seconds
568   06:22:00 PM 10/17/2022                                     6 seconds   06:22:06 PM 10/17/2022   BAD                        1 minute and 4 seconds
569   06:23:10 PM 10/17/2022                                     6 seconds   06:23:16 PM 10/17/2022   BAD                        1 minute and 2 seconds
570   06:24:18 PM 10/17/2022                                    43 seconds   06:25:01 PM 10/17/2022   BAD                                    49 seconds
571   06:25:50 PM 10/17/2022                                     6 seconds   06:25:56 PM 10/17/2022   BAD                                    51 seconds
572   06:26:47 PM 10/17/2022                                     6 seconds   06:26:53 PM 10/17/2022   BAD                        1 minute and 8 seconds
573   06:28:01 PM 10/17/2022                                     6 seconds   06:28:07 PM 10/17/2022   BAD                                    46 seconds
574   06:28:53 PM 10/17/2022                                     6 seconds   06:28:59 PM 10/17/2022   BAD                       1 minute and 11 seconds

Some questions:

  1. Is there another log we can look at that might give information on why these reboots are happening?
  2. What happens to the module if the carrier board drive “PWR_EN” signal went low while the xavier was booted (if for instance this signal was noisy)?

Please use the serial console to monitor what is happened before the reboot.

It might trigger shutdown.

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