open xterm sudo gainroot vi /etc/systemui/systemui.xml position cursor on beginning of comment <!-- above reboot item, enter dd (press d twice) to delete it position cursor on end of comment -->, enter dd (press d twice) to delete it enter ZZ (twice shift + z) to save It is critical to not to mess this file or your tablet will not boot. Do it slowly. Enter :q! to exit vi without saving if you are not sure what you entered. You may also just move the comment beginning <!-- below the reboot item to leave other items still disabled but it is harder.
<powerkeymenu path="/"> <title>powerup_application_title</title> <po>osso-powerup-shutdown</po> <menuitem priority="100" name="powerup_memainmenu_locktouchscreen"> <return>1</return> <po>osso-powerup-shutdown</po> </menuitem> <menuitem priority="90" name="powerup_memainmenu_normalmode" visible="flight"> <keyfile>/var/lib/mce/mode</keyfile> <return>2</return> <po>osso-powerup-shutdown</po> </menuitem> <menuitem priority="90" name="powerup_memainmenu_flightmode" visible="normal"> <keyfile>/var/lib/mce/mode</keyfile> <return>3</return> <po>osso-powerup-shutdown</po> </menuitem> <menuitem priority="80" name="powerup_memainmenu_lockdevice" disabled="yes"> <keyfile>/var/run/mce/call</keyfile> <return>4</return> <po>osso-powerup-shutdown</po> <disabled_reason name="powerup_ib_device_lock_not_available"> <po>osso-powerup-shutdown</po> </disabled_reason> </menuitem> <menuitem priority="20" name="Reboot"> <return>6</return> <po>osso-powerup-shutdown</po> </menuitem> <menuitem priority="10" name="Soft poweroff"> <return>7</return> <po>osso-powerup-shutdown</po> </menuitem> <menuitem priority="5" name="Top in XTerm"> <callback service="com.nokia.xterm" path="/com/nokia/xterm" interface="com.nokia.xterm" method="run_command" bus="session" autostart="true"> <argument type="string">/usr/bin/top</argument> </callback> </menuitem> <return>5</return> <po>osso-powerup-shutdown</po> </menuitem> </powerkeymenu>