"failed to install override security policy" error in UEFI boot

view story

https://bbs.archlinux.org – First, I recommend you contact James Bottomley with a bug report about PreLoader.efi. (His e-mail is James.Bottomley at HansenPartnership.com; this is in the source code to PreLoader, so it's OK to post it here.) You might also want to file an Arch Linux bug report. Clearly, this should not be happening, and on most computers it doesn't. It seems that Secure Boot is disabled on your system, and on such a computer, PreLoader should just pass control on to loader.efi, rather than fail.Your new problem ("device did not show up after 30 seconds....") sounds like one of two issu (HowTos)