AFAIK, IRQs 10 & 11 are free, this should not be a problem.
On another hand, this is a BIOS related issue and could be the visible part only.
Maybe your BIOS needs to be updated...
About QLBD :
Quote:
hpqlb0 at acpi0 (QLBD, HPQ0006): HP Quick Launch Buttons
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source : Daemonforums.org - Getting Xfce4...