https://devzone.nordicsemi.com/f/nordic-q-a/16705/losing-systicks-in-nrf52-w-freertos-using-sd_app_evt_waitI am using the nRf52 device with FreeRtos and SD132 version 11.0. The configUSE_TICKLESS_IDLE is set to &#39;1&#39; to allow the device to go to sleep. After the OS is started - there is not much going on except for the fact that a LED is supposed to blink afteren-USTelligent Community 13Thu, 27 Oct 2016 18:45:46 GMThttps://devzone.nordicsemi.com/thread/63917?ContentTypeID=1Thu, 27 Oct 2016 18:45:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8a1673f4-7aad-4e6b-becc-67c945f1eb54Susheel Nuguru<p>Found one issue and fixes are proposed in <a href="https://devzone.nordicsemi.com/question/99299/why-is-the-freertos-function-xtimerresetfromisr-not-working-in-tickless-mode/">here</a></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/63918?ContentTypeID=1Tue, 27 Sep 2016 23:35:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:06e061e7-639e-4789-830e-5652e95d64fdRK<p>Typing vPortSuppressTicksAndSleep into the search box would have found you the information you wanted here.</p> <p><a href="https://devzone.nordicsemi.com/question/93241/what-are-sdk-1200-known-issues/">devzone.nordicsemi.com/.../</a></p> <p>issue 8) in the resolved list. Move to SDK12 (or import the FreeRTOS port from it)</p><div style="clear:both;"></div>