I am trying to install lubuntu on my Asus netbook. Before I reach installation type, I see warning:
Force UEFI Installation? This machines's firmware has started this installer in UEFI mode but it looks like there maybe existing operating systems already installed using BIOS compatibility mode, If you continue to install Debian in UEFI mode,it might be difficult to reboot into any BIOS-mode operating system.
Then if I try to go "Erase disk and install Lubuntu", it fails to install grub:
The 'grub-efi-amd64-signed' package failed to install into /target/. Without the grub boot loader, the installed system will not boot.
If I chose "Something else", create partitions: ext4 mounted in '/', swap and efi, and chose efi to install boot loader there, installation seems to finish successfully.
But when I turn the computer on again, only bios appears and I don't see lubuntu in booting options.
Failure to install grub happens also when I chose the whole disk (/dev/mmcblk0, while efi is /dev/mmcblk0p1) as a "device for boot loader installation".
On the other hand, can I correctly setup grub from terminal, considering the fact that I have a fully functioning system until I restart the computer?
Any ideas? Thank you!