linux-kernel - Re: 2.6.18-rc6-mm2 (-mm1): ohci_hcd does not recognize new devices

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Date:	Mon, 18 Sep 2006 08:27:50 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Andrew Morton <akpm@...l.org>
Cc:	David Brownell <david-b@...bell.net>,
	LKML <linux-kernel@...r.kernel.org>,
	USB development list <linux-usb-devel@...ts.sourceforge.net>,
	Greg KH <greg@...ah.com>,
	Alan Stern <stern@...land.harvard.edu>
Subject: Re: 2.6.18-rc6-mm2 (-mm1): ohci_hcd does not recognize new devices

On Saturday, 16 September 2006 10:13, Rafael J. Wysocki wrote:
> On Saturday, 16 September 2006 00:13, Rafael J. Wysocki wrote:
>
> > It looks like the ohci_hcd driver sometimes has problems with the
> > initialization (eg. USB mouse doesn't work after a fresh boot and reloading
> > of the driver helps).
> > 
> > I have observed this on two different x86_64 boxes (HPC 6325, Asus L5D),
> > but it is not readily reproducible.  Anyway I've got a dmesg output from a
> > failing case which is attached.
> 
> Actually, the problem is ohci_hcd doesn't seem to recognize devices plugged
> into the USB ports.
> 
> For example, if I unplug and replug a mouse (that worked before unplugging),
> it doesn't work any more.  I have to reload ohci_hcd to make it work again.
> 
> This is 100% reproducible and occurs on the two boxes above.

I have carried out a binary search and found that the problem is caused by

gregkh-usb-usbcore-remove-usb_suspend_root_hub.patch

Greetings,
Rafael


-- 
You never change things by fighting the existing reality.
		R. Buckminster Fuller
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