Installation completed on the the Lenovo G770 with InsydeH2O Bios. It was successful. Here are the steps I followed: The drive partition table is GPT. I created a fat32 partition in first position and set the flag to boot (partition type is EFI, checked with gdisk type ef00). Then an ext4 / , an ext4 /home and a swap. The installer warned me that with this partition table format in use I should normally have a separate partition for the boot loader code, also it nay still be possible to install the boot loader to a partition. I ignored that, did not create one and went one the installation process. It completed nicely. I then installed grub-efi-amd64 and all is working perfectly on this laptop, the system now works just fine.