You can modify the EFI boot order under Linux using the efibootmgr command:
https://www.linuxbabe.com/command-line/how-to-use-linux-efibootmgr-examples
It worked on my Lenovo P51 laptop.
-----Original Message-----
From: David Mehler
Sent: Monday, July 27, 2020 11:24 AM
To: blind-sysadmins
Subject: [Blind-sysadmins] setting USB first in bcd boot order
Hello,
I've got an asus Motherboard with UEFI. It's set to UEFI boot mode and I've disabled secure boot. I'm trying to get it to boot a Linux thumb drive and having no success. If I put in a windows talking PE and boot, pressing f8 (the key on my motherboard to bring up the UEFI boot menu), then when the menu comes up, down arrow three times, the windows PE loads and it will start talking. This was created with Rufus.
If I try a Linux-created thumb drive, in this case Debian10 live, for example purposes, I put it in, f8, down arrow three times, enter, and nothing, no boot beep, no drum sound, nothing.
What i'd like to do is set USB to be first in the f8 UEFI boot menu, I believe this requires altering the bcd. Can anyone confirm this and if so do you have a procedure?
The ideal outcome is I put in any bootable thumb drive and start the system and it boots it. If there's no bootable thumb drive in the system the system goes to the second choice, win10.
Thanks.
Dave.
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