Stuck on initialising devices

[2cfg]

Hi!
I have problem with initialising iPXE when i boot this from Grub2 menuentry:

Code:

menuentry "WinPE" {
  linux16 (tftp)/ipxe.lkrn
  initrd16 (tftp)/boot/pxe/boot.ipxe
}

Grub2 is booted over the TFTP and invoke the iPXE kernel to load in a chain to load the WinPE.

I compiled the iPXE in debug mode and found that the freeze occurs at the PCI bus stage.
I also found that iPXE is loading if I disconnect SATA drives.

Can you help me to resolve this problem?