linux-kernel - Re: USB regression (and other failures) in 2.6.2[45]*

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Date:	Sat, 16 Feb 2008 10:20:16 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Oliver Pinter <oliver.pntr@...il.com>
cc:	Andrew Buehler <abuehler.kernel@...il.com>,
	<linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Greg KH <greg@...ah.com>, <linux-scsi@...r.kernel.org>,
	<linux-usb@...r.kernel.org>
Subject: Re: USB regression (and other failures) in 2.6.2[45]*

On Sat, 16 Feb 2008, Oliver Pinter wrote:

> On 2/15/08, Andrew Buehler <abuehler.kernel@...il.com> wrote:
> > In my workplace, I use a customized version of Novell's ZENworks imaging
> > boot CD, which is based off of Linux. I have one particular model of
> > laptop - the IBM/Lenovo R61 - on which three different things fail
> > completely in current kernels (tested with 2.6.24.2 and 2.6.25-rc1):
> > USB, AHCI (and thus access to the SATA drive), and networking. As a
> > consequence of all three failing in parallel, I have no practical way to
> > get logs and other information off of the machine to help with tracking
> > down the bugs.

...

To make a long story short, the USB symptoms you describe indicate a
problem with interrupt routing.  This could well explain the other
difficulties too.  There are various kernel parameters you can try
putting on the boot command line to work around it:  acpi=noirq or
acpi=off or pci=noacpi or a few others.

Alan Stern

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