I think in the Android system, is a binary file that runs when you press the off button on the remote control. On the screen opens a menu with options to shutdown, reboot and reboot into Ubuntu. I assumed that this binary file /dev/system/bin/power (or some other ?). If you collect new variant of the file (with applied patch) and send me this new variant of the file with (power), I can put in my version MultiOS_3in1.
For LE and Linux I already did those options. In shutdown menu LE is already running in GUI mode. In Linux I soon plan to collect a special graphical utility for these modes and fan control. By the way, I put together a new version of u-boot for MultiOS_3in1, which allows you to update the firmware DualOS kernel (used in Linux Mate) to version 4.9.40. I checked, everything works.