I am working with the nRF9151 (SMA) and attempting to place the system into the lowest power state using sys_poweroff() . After entering this state, I observe undefined debugger behavior: The SEGGER J-Link debugger eventually times out and loses connection The timeout is inconsistent: sometimes ~5 minutes, sometimes ~30 minutes There is no clear pattern for when the debugger disconnect occurs Expected behavior: I expect either: A consistent debugger disconnect immediately after entering sys_poweroff Observed behavior: Debug session remains active for a variable period before timing out After timeout, re-connection requires manual intervention (reset/reflash) I do have some questions. Is this expected behavior when entering sys_poweroff on nRF9151? Are there recommended steps to ensure deterministic debugger disconnect behavior? Could LTE modem activity affect timing before full poweroff?

nRF9151 sys_poweroff causes intermittent debugger timeout

I am working with the nRF9151 (SMA) and attempting to place the system into the lowest power state using sys_poweroff().

After entering this state, I observe undefined debugger behavior:

Expected behavior:
I expect either:

Observed behavior:

I do have some questions.

Is this expected behavior when entering sys_poweroff on nRF9151?
Are there recommended steps to ensure deterministic debugger disconnect behavior?
Could LTE modem activity affect timing before full poweroff?