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Date: Mon, 27 Sep 2010 23:00:19 +0200
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai-help] switchtest/xeon-test fails: Help needed
 (Ubuntu/Core i7)
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To: Gajamohan Mohanarajah <gajamohan.m@domain.hid>
Cc: xenomai@xenomai.org, Jan Kiszka <jan.kiszka@domain.hid>

Gajamohan Mohanarajah wrote:
> Hi Gilles,
> 
> I tried your 3 suggestions. But no luck.
> I am attaching the config file for reference.
> The kernel base on this config file boots without any problem with the
> [nolapic] option (or the [acpi=off] option).
> (Ref:https://wiki.ubuntu.com/DebuggingACPI)
> But fails with [acpi=ht] option.
> 
> Gajan
> 
> I tried the following grub options too:
> acpi=off  -> works fine
> acpi=ht -> doesn't work
> [according to https://wiki.ubuntu.com/DebuggingACPI : This means the
> issue is in the ACPI table parsing code itself, or perhaps the SMP
> code. ]

Since the problem seems to be with IRQ routing, I would suggest
acpi=noirq

According to the wiki you found.

In fact, I would try all the options suggested to find the one which
works...

-- 
                                                                Gilles.