Gentoo Archives: gentoo-user

From: Peter Humphrey <peter@××××××××××××.uk>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] UEFI booting
Date: Sun, 28 Aug 2016 15:47:51
Message-Id: 2082053.kcsZ8rVgW5@peak
In Reply to: Re: [gentoo-user] UEFI booting by Mike Gilbert
1 On Sunday 28 Aug 2016 10:26:15 Mike Gilbert wrote:
2 > On Sun, Aug 28, 2016 at 6:55 AM, Peter Humphrey <peter@××××××××××××.uk>
3 wrote:
4 --->8
5 > > ... part of the output of "bootctl status":
6 > >
7 > > Boot Loader Binaries:
8 > > ESP:
9 > > /dev/disk/by-partuuid/f3fa7b95-0a65-4716-924a-ae3f30811de5
10 > >
11 > > File: └─/EFI/systemd/systemd-bootx64.efi (systemd-boot 231)
12 > > File: └─/EFI/BOOT/BOOTX64.EFI
13 > >
14 > > Those binaries have been built on my system: by what process?
15 >
16 > When you run bootctl install, it copies
17 > /usr/lib/systemd/boot/efi/systemd-bootx64.efi to
18 > /boot/EFI/systemd/systemd-bootx64.efi and /boot/EFI/BOOT/BOOTX64.EFI.
19
20 Ah, so when one of those is started, all it does (for present purposes) is
21 to load the kernel specified in the appropriate /boot/loader/entries entry.
22
23 > BOOTX64.EFI is only there as a fallback; if your EFI variables get
24 > reset for some reason, most EFI firmwares will look for a file by that
25 > name as a failsafe.
26
27 I think I'd more-or-less inferred that, but thanks for the confirmation.
28
29 --
30 Rgds
31 Peter