linux-kernel - Re: Endless print of uhci_result_common: failed with status 440000

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Message-ID: <Pine.LNX.4.44L0.1104081025140.1992-100000@iolanthe.rowland.org>
Date:	Fri, 8 Apr 2011 10:28:04 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Zdenek Kabelac <zdenek.kabelac@...il.com>
cc:	USB list <linux-usb@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Endless print of uhci_result_common: failed with status 440000

On Fri, 8 Apr 2011, Zdenek Kabelac wrote:

> Hi
> 
> While debugging resume problem with Intel HW I've been hitting problem
> with endless print of  usb 1.1 error message on my T61.
> (See my other similar post
> http://marc.info/?l=linux-kernel&m=130221292724436&w=2)

This is essentially the same problem.

> This time the problem is generated by Bluetooth device.
> 
> Often just only several messages are printed - and then machine
> suspend - so the log usually contains only several such message - if
> at all - however today with debugging and serial console logging -
> I've seen several times - that suspend resulted in endless unbreakable
> loop.
> 
> As a workaround - one could just disable BT device:
> "echo disable >/proc/acpi/ibm/bluetooth"

...

> Googling it - seems it's common issue of this BT chipset - but I think
> is should not cause suspend deadlock ??

Are you sure anything is deadlocked?  What happens if you disable 
CONFIG_USB_DEBUG?

Alan Stern

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