Dell GXP50 boot problem

[Bob Wooden]

I have four of these Dell GX50 model.  Two work fine.  Two report the 
same code (different code numbers) and "hang" after these lines appear:

first machine:
[20.645497] PCI: Cannot allocate resource region 4 of device 0000:00:1f.2
[20.645590}PCI: Cannot allocate resource region 4 of device 0000:00:1f.1

second machine:
[20.727272] PCI: Cannot allocate resource region 4 of device 0000:00:1f.2
[20.727365] PCI: Cannot allocate resource region 4 of device 0000:00:1f.1

I am not sure if these are Dell error report (from GX50 computer) or 
Ubuntu/LTSP report error.  I have confirmed that the BIOS is set the 
same on all machines.  What could be wrong?