Dell laptop hangs on initialsing devices

[robinsmidsrod]

You could be dealing with a broken PXE firmware or a broken iPXE driver. Obviously first thing to try is to update your BIOS and see if that helps. If not, then you should be trying out the tests on http://ipxe.org/dev/driver with both the UNDI driver (undionly.kpxe using chainloading) and the native iPXE driver (using ipxe.usb and booting via usb stick). You should also tell us the PCI vendor/device IDs of your network adapter.