Ralph Corderoy <ralph@inputplus.co.uk> 于2019年11月15日周五 下午8:57写道：
Hi Hongyi,
I noticed that for many distro's install iso, there are some efi files in the EFI/efi folder as follows: bootx64.efi, loader.efi and grubx64.efi
Say, for arch: bootx64.efi, loader.efi
for debian: bootx64.efi grubx64.efi
bootx64.efi is the default, others may exist as you can see. NVRAM defines a list to iterate over of *.efi to attempt. https://wiki.mageia.org/en/About_EFI_UEFI#The_ESP has some detail. The start of https://jdebp.eu/FGA/efi-boot-process.html may also be useful.
But, I've tried use the grub2's chainloader method to invoke these efi loaders, and I found that for most of the time, if both of the bootx64.efi and grubx64.efi exists, the latter will have the most chance to succeed, but the former often failed to boot. Regards
-- Cheers, Ralph.
-- Hongsheng Zhao <hongyi.zhao@gmail.com> Institute of Semiconductors, Chinese Academy of Sciences GnuPG DSA: 0xD108493