I've been trying to install 4.5 on a new SSD (as the sole OS), using the default installation layout (but encrypted). I can boot the USB when CSM is enabled and Secure Boot is disabled in BIOS (impossible otherwise) and seemingly successfully install, but on reboot it goes straight back into the BIOS (i.e. no bootable drive found) no matter where I place the bootloader (or leave it out completely). Has anyone else seen something similar?
Edit: I successfully installed MX Linux on it so I know the drive is good.