Erro no gentoo!!!!!!

option kernel pci=noacpi


irq 7: nobody cared (try booting with the "irqpoll" option)

Call Trace:
[] __report_bad_irq+0x30/0x72
[] note_interrupt+0x1e8/0x22b
[] handle_edge_irq+0xf9/0x128
[] do_IRQ+0x6c/0xd6
[] default_idle+0x0/0x3d
[] ret_from_intr+0x0/0xa
[] default_idle+0x29/0x3d
[] cpu_idle+0x8b/0xae

handlers:
[] (usb_hcd_irq+0x0/0x52)
Disabling IRQ #7