UCM-iMX8M-Mini: Yocto Linux: Known Issues

On-board WiFi module does not wake up correctly from deep sleep mode

WiFi module stops working after the sleep-wake cycle, such as the following: rtcwake -drtc1 -mmem -s5 Affected kernel versions : All Workaround : Once the device wakes up, re-bind the WiFi module echo 30b40000.mmc > /sys/class/mmc_host/mmc1/device/driver/unbind; echo 30b40000.mmc > /sys/class/mmc_host/mmc1/device/driver/bind

On-board WiFi module loses connection on 5GHz band

In some cases the on-board WiFi module might drop connection on 5GHz band. The functionality recovers after a reboot. Affected kernel versions : 5.10.35