Shutdown delay after pressing red power button in remote

[elui]

Hi

I have a UE40B7020 with patched firmware wich loads samygo extensions pack and mounts NAS samba shares to samygo virtual usb.

I am currently using a Raspberry pi and I power off my tv with remote and it sends the shutdown signal to raspi through HDMI-CEC. (kodi in raspberry pi is configured to catch shutdown press signal and shutdown itself)

Unfortunately, TV cuts power to usb port earlier than Rapberry pi completes its shutdown, so no proper shutdown is performed.

I would like to know if there is a way to delay shutdown after I press red power off button in my remote.

I have found someone has had the same issue with a different Tv model, but no solution was given

viewtopic.php?t=6828

Please don't tell me to use an external power supply. I have already tried it.

Thanks