Jetson Orin NX 8GB: Persistent Network Boot Options (PXE/HTTP) – No "Disable" option in UEFI Menu (L4T R35.5.0)

Robotics & Edge Computing Jetson Systems Jetson Orin NX
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1

Hi everyone,

I am working with a Jetson Orin NX 8GB module and I am struggling to permanently remove/disable the HTTPv6, HTTPv4, PXEv6, and PXEv4 boot options. My goal is to prevent the bootloader from attempting to initialize the PHY/Network during the early boot stage to ensure a fast and deterministic startup time.

System Information:

  • Module: Jetson Orin NX 8GB

  • L4T Version: R35 (release), Revision 5.0 (JetPack 5.1.x)

The Issue: Even though these network options are not at the top of my priority list, the bootloader still attempts to prepare the network interface during the pre-boot sequence. This causes inconsistent boot delays depending on the ethernet environment (noise, cable connectivity, etc.). I need a stable boot time where the system ignores the ethernet interface entirely until the OS starts.

What I have tried:

  1. efibootmgr: I attempted to delete these entries using efibootmgr from the OS. However, they reappear automatically after every reboot.

  2. UEFI Menu: I explored the UEFI/BIOS settings during startup, but there is no “Attempt HTTP boot” or “Enable/Disable PXE” option available in this firmware version to toggle these features off.

Request: Since I am new to the Jetson ecosystem, could you please provide guidance on how to permanently disable these network boot targets?

  • Do I need to modify specific configuration files in the Linux_for_Tegra/bootloader/ directory (like UefiDefaultVariableConfig) before re-flashing?

  • Is there a way to modify the UEFI variables via the serial console or a specific script to ensure these changes persist?

I would appreciate a step-by-step explanation on how to ensure the system skips the PHY initialization during boot.

Thanks in advance!

4

Hi,

Please try to access UEFI menu and do
Boot Maintenance Manager → Boot Options → Delete Boot Option and check whether meet your requirements.

Thanks

1 Like
5

Dear Moderator,

I also tried this way, After deleting the ethernet based boot options, they came back after rebooting.

Thanks.

6

Hi,

Please refer to the uefi source code edk2-nvidia/Silicon/NVIDIA/Drivers/TegraPlatformBootManager/TegraPlatformBootManagerDxe.c at r35.5.0-updates · NVIDIA/edk2-nvidia · GitHub and modify TegraPlatformBootManagerDxe.c

For example, add IsNetworkBootOption function and check it in IsValidLoadOption.

Rebulid the uefi follow the Build · NVIDIA/edk2-nvidia Wiki · GitHub.
And replace it under the Linux_for_Tegra/bootloader/uefi_jetson.bin

/*
  Checks whether the boot option contains an IPv4 or IPv6 device path node,
  indicating a network (PXE/HTTP) boot option.

  @param[in] LoadOption            Load option buffer.

  @retval TRUE                     Load option is a network boot option.

  @retval FALSE                    Load option is not a network boot option.
*/
STATIC
BOOLEAN
IsNetworkBootOption (
  IN  EFI_BOOT_MANAGER_LOAD_OPTION  *LoadOption
  )
{
  VOID  *DevicePathNode;

  DevicePathNode = LoadOption->FilePath;
  while (!IsDevicePathEndType (DevicePathNode)) {
    if ((DevicePathType (DevicePathNode) == MESSAGING_DEVICE_PATH) &&
        ((DevicePathSubType (DevicePathNode) == MSG_IPv4_DP) ||
         (DevicePathSubType (DevicePathNode) == MSG_IPv6_DP)))
    {
      return TRUE;
    }

    DevicePathNode = NextDevicePathNode (DevicePathNode);
  }

  return FALSE;
}


STATIC
BOOLEAN
IsValidLoadOption (
  IN  EFI_BOOT_MANAGER_LOAD_OPTION  *LoadOption
  )
{
  EFI_STATUS              Status;
  EFI_HANDLE              Handle;
  EFI_DEVICE_PATH         *DevicePath;
  VOID                    *DevicePathNode;
  CONTROLLER_DEVICE_PATH  *Controller;

+  if (IsNetworkBootOption (LoadOption)) {
+    DEBUG ((DEBUG_INFO, "%a: Filtering out network boot option: %s\n", __FUNCTION__, LoadOption->Description));
+    return FALSE;
+  }

Thanks

1 Like