I read here that it is essential to have Secure Boot enabled:
However I find that when I enable Secure Boot, it changes it so that systems can boot with UEFI boot, but not Legacy, it also disables CMS. However, when I then try to boot my system, I get 3 different start things that I can boot from:
- ATAPI CD1: PLDS DVD-RW DS8A8SH
- ATA HDD0: TOSHIBA MK5065GSX
> PCI LAN
- LAN(3C970E7102F6) -IPv4
- LAN(3C970E7102F6) -IPv6
But no matter which of them I choose, I just get back to that screen and cannot boot, then the only way is to go to the other tab and select Setup, go back into BIOS, and disable Secure Boot, and then say that both Legacy and UEFI are supported in the Setup options (as just disabling Secure Boot does not work).
So I am assuming that my current and only OS, Ubuntu GNOME 15.04 (64-bit), does not support UEFI boot, and only Legacy. So is there anything that I can do about this so that I can enable Secure Boot? And why does it only support Legacy anyway? And just as a quick note, this didn't work when I had Windows 7 (a long long time ago in a galaxy far far away...) either.