I stumbled across this message, unfortunately I don't have the original to respond to.

http://lkml.org/lkml/2008/11/10/41

The problem mentioned, that unloading hpilo causes the iLO IRC kbd/mouse (uchi_hcd) to become non-functional, is not an IRQ issue.

iLO function 2 (hpilo) shares some global resources with function 4 (uhci_hcd), and when hpilo calls pci_disable_device(), the removal of busmastering (PCI_COMMAND_MASTER) means that the IRC kdb/mouse can't do what it needs to do. Reloading hpilo will allow the IRC kdb/mouse to function correctly.

I've been struggling with what to do about this, removing the pci_disable_device() from hpilo will "fix" the problem, but that is clearly a hack.
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