linux-kernel - Re: PROBLEM: additional serial ports on MS9830 board do not work (IRQ problems)

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Message-ID: <20100905233504.5000a308@lxorguk.ukuu.org.uk>
Date:	Sun, 5 Sep 2010 23:35:04 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Jan Kandziora <jjj@....de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: PROBLEM: additional serial ports on MS9830 board do not work
 (IRQ problems)

> I tried the suggested option "irqpoll", but then the computer just freezes 
> when I do "od /dev/ttyS0" and touch the screen. No kernel panic, just a hard 
> freeze. I tried "acpi=noirq", "acpi=off" and disabling the APIC in the BIOS 
> setup, too. None of these made the serial irq work.

I suspect you need a BIOS which has correct tables for IRQ routing.

> Can you give me any useful pointers what to try next? Kernel configuration is 
> attached.

Vendor for BIOS update would be the obvious starting point.
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