UEFI boot order, Re: Tip: Remote FAI install

[Ingo Wichmann]

Hi Thomas,

 > I wonder why the second machine has two LAN entries, because it's a
 > Thinkpad laptop with only one ethernet device.

my Tuxedo-Laptop also has two entries:
Boot0001* UEFI: PXE IP4 Realtek PCIe GBE Family Controller
and
Boot0002* UEFI: PXE IP6 Realtek PCIe GBE Family Controller	

A ThinkPad on my desk also has two entries. From the out put of 
efibootmgr -v you can't tell the difference. But when you boot, you can 
choose between IPv4 and IPv6.

Ingo


Am 19.01.23 um 20:52 schrieb Thomas Lange:
> Hi
> 
> for one-time changes in the boot order, you can use
> efibootmgr --bootnext
> and set this to the network device. From man efibootmgr:
> 
> BootNext - the boot entry which is scheduled to be run on next
>             boot. This supercedes BootOrder for one boot only, and is
>             deleted by the boot manager after first use.  This allows
>             you to change the next boot behavior without changing
>             BootOrder.
> 
> But in the end, we want to have a script that changes the boot
> order. And we must check if an upgrade of the grub package calls
> grub-install again because that may change the order.
> 
> First I like to collect the output of efibootmgr. I like to know how
> different the network boot options are stored in UEFI BIOS.
> 
> Here are two examples:
> 
> BootCurrent: 0000
> BootOrder: 0000,0001
> Boot0000* debian
> Boot0001* UEFI: IP4 Intel(R) 82579LM Gigabit Network Connection
> 
> 
> 
> BootCurrent: 0001
> BootOrder: 0001,0002,001D,0017,0018,0019,001A,001C,0000,001E,001F,0024,001B
> Boot0000* Windows Boot Manager
> Boot0001* debian
> Boot0002* Linux-Firmware-Updater
> .
> .
> Boot001D* PCI LAN
> Boot001E  Other CD
> Boot001F  Other HDD
> Boot0020* USBR BOOT CDROM
> Boot0021* USBR BOOT Floppy
> Boot0022* ATA HDD
> Boot0023* ATAPI CD
> Boot0024* PCI LAN
> 
> 
> I wonder why the second machine has two LAN entries, because it's a
> Thinkpad laptop with only one ethernet device.
> 

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