Thanks for answer. It is working for me. I only done Open Settings and select System. Select Power and sleep, then click on Additional power settings - in the following window, click on 'Choose what the power button does' in the left hand pane.
In the subsequent window, first click on 'Change settings that are currently unavailable' ( near the top of the Window ) and then remove the checkmark from the box against 'Turn on fast start-up (recommended)'. Click the Save Settings button
After that it is working