Re: IRQ handler type mismatch for IRQ 7

From: Ingo Molnar
Date: Mon Jun 11 2007 - 09:12:17 EST



* Vegard Nossum <vegard.nossum@xxxxxxxxx> wrote:

> I receive this on a fresh install of Fedora 7 (x86_64) running
> 2.6.21-1.3194.fc7, and wonder if it's something to worry about:
>
> IRQ handler type mismatch for IRQ 7
> current handler: parport0

> [<ffffffff802adf6d>] request_irq+0xd7/0xfd
> [<ffffffff8039a583>] serial8250_startup+0x423/0x56f

so both parport and serial is on the same IRQ: #7, but the parport one
does not support shared interrupt lines (IRQF_SHARED). You can probably
change the mapping in the BIOS (change the serial one to say IRQ#3 or
IRQ#4). I suspect you dont have any real parallel port hardware
attached? (and probably no serial port hardware either?) So you can
safely ignore this.

Ingo
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