up_squared: tests/subsys/power/power_mgmt failed.

[chen-png]

To Reproduce
Steps to reproduce the behavior:

1. west build -b up_squared -p auto tests/subsys/power/power_mgmt
2. west flash ~/up_squared.sh
3. see error

Logs and console output
Booting Zephyr OS build zephyr-v2.4.0-1137-g5803ee1e8183
Running test suite power_management_test

START - test_power_idle
give way to idle thread
PASS - test_power_idle

START - test_power_state_trans

it will stop at there, and fail with timeout.

Environment (please complete the following information):

• OS: Fedora31
• Toolchain: zephyr-sdk-0.11.4
• Commit ID: 5803ee1

[jenmwms]

This is still an issue asof c08ef38. Though similar symptom, seems different approach needed than #30275. test_power_state_trans frozen/still running after 9 minutes (stopwatch).

[jenmwms]

I need to do a bisect to see where this started occurring.

[nashif]

some issues with this test were fixed in cf81774, any other issues most likely due to now #30573