I follow this guide and other guide to install Catalina on my pre-partition GL552VX(cannot manage to do full wipe because of a lot of data)-(only attached wireless ktext to plist)
Successfully booted into recovery and downloaded the installer to the separated 128GB partition.
The system flashing a few times then booted back to Windows, I then again booted to the USB, enter the Catalina installer. However, from here, it won't install saying cannot verifying the firmware.
BIOS settings is as said, Graphics memory is 512MB(is this a problem).
I used to install via Clover method but it seems I can no longer obtain the installer or recovery on Windows 10 for Clover, also the config is buggy, my system stalls alot on Clover