Environment

• UEFI Vendor: American Megatrends (AMI)

• UEFI Specification Version: UEFI 2.8; PI 1.7

• Core Firmware Version: 5.22

• Client Hardware: AMD EPYC 7543P 32-Core Processor, 256GB DDR4 memory

• USB Version: 2.0

Description

• Previous version: I previously used iPXE 1.0.0+ (self-compiled), which worked normally on my PXE server and could chain-load boot.php without any keyboard issues.

• Update process: Recently, I noticed updates to the iPXE project on GitHub, so I cloned the latest source code, compiled it to version 1.21.1+, and replaced the old 1.0.0+ ipxe.efi in my HTTP server directory.

• Core Problem: After the client downloads ipxe.efi via HTTP, the keyboard becomes unresponsive (Caps Lock cannot be toggled). This issue persists in subsequent steps:

  • After chain-loading the boot.php menu: The keyboard remains unresponsive, and only the default boot item launches automatically.

  • After changing the default boot item to the iPXE shell: I still cannot type any characters in the shell interface.

Compilation Command

make bin-x86_64-efi/ipxe.efi EMBED=./chainloader.ipxe

chainloader.ipxe Content

#!ipxe
dhcp
isset ${next-server} || set next-server 192.168.58.1
chain http://${next-server}/boot.php || goto fail

:fail
echo A network error will enter the iPXE shell environment !
sleep 3
shell || reboot