linux-kernel - [Bug 43238] Re: PCI ACPI/IRQ-routing broken on H77 chipset + Ivy Bridge (kernel 3.5-rc7 and earlier)

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Message-ID: <CAErSpo5SCa0NdZUtLpLDma+i6+L7NH7pOFvUzOAD4TougvqMQg@mail.gmail.com>
Date:	Mon, 30 Jul 2012 11:12:48 -0600
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Malte Schröder <maltesch@....de>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Galen Seitz <galens@...tzassoc.com>,
	bugzilla-daemon@...zilla.kernel.org
Subject: [Bug 43238] Re: PCI ACPI/IRQ-routing broken on H77 chipset + Ivy
 Bridge (kernel 3.5-rc7 and earlier)

> I was pointed to https://bugzilla.kernel.org/show_bug.cgi?id=43238.
> I tried the modifications to the DSDT that where proposed there and
> voilŕ, the 3c905c started to work :)

I don't know where to go with this.  We do have some _PRT quirks in
drivers/acpi/pci_irq.c, but since Windows 7 works fine without any
quirks, adding a quirk to Linux doesn't seem like the "right" fix.

Lubos, would it be possible for you to collect a Windows system report
using AIDA64?  I think there's a free trial version here:
http://www.aida64.com/

Maybe somebody can compare what Windows does with what Linux does and
figure out the difference.
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