Just thought i'd chime in with a solution that may help someone else one day.
I was pulling my hair out trying to work out why after installation of the boot loader and the .pat file my generic PC would not boot XPEnology.
I made many tweaks to the BIOS and read heaps of stuff in this forum, installed the extra.lzma etc etc.
After setting up a serial connection I found the following....
[ 5.819006] ehci-pci 0000:00:1d.7: port 1 reset error -110
[ 5.826257] ehci-pci 0000:00:1d.7: port 1 reset error -110
[ 5.833493] ehci-pci 0000:00:1d.7: port 1 reset error -110
[ 5.840729] ehci-pci 0000:00:1d.7: port 1 reset error -110
[ 5.847967] ehci-pci 0000:00:1d.7: port 1 reset error -110
[ 5.854205] hub 1-0:1.0: hub_port_status failed (err = -32)
It turned out to be one of those internal USB hubs that does SD cards etc that you mount into your case in the FDD slot, I had completely forgotten about.
After disconnecting that all was well. I hope this one day helps someone here.