On trying to upgrade my system to FC4, I've run into a problem with the sata-sil module as supplied by FC4.
When Anaconda loads the sata-sil module (which I need, as /home is in a SATA drive), the kernel throws an error (disabling IRQ #10) and dies.
Looking at the traceback on the other console leads me to believe that the sata-sil module is enabling the interrupt before hooking the interrupt, or is not telling the kernel that the interrupt has been handled, or is not clearing the IRQ in the hardware, or something, as the kernel believes that the int10 is has not been handled.
I've tried passing "lapic noirqdebug" to the kernel, but then things just die.
It looks like the default kernel as used by the FC4 upgrade does NOT enable the ioapic by default - leaving all the hardware piled up on the normal PIC interrupt channels.