linux-kernel - Re: USB serial regression 2.6.31.1 -> 2.6.31.2 (and 2.6.32-rc3)

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Date:	Sat, 10 Oct 2009 13:45:20 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Greg KH <greg@...ah.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	Hugh Blemings <hugh@...mings.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: USB serial regression 2.6.31.1 -> 2.6.31.2 (and 2.6.32-rc3)

On Fri, 2009-10-09 at 21:56 -0400, Alan Stern wrote:
> > > At the end, I think I yanked it out.
> 
> This looks a lot like a hardware problem, such as bad USB cables.  
> Could you collect a usbmon trace for bus 4?  It ought to show whether
> this is the case or whether software is at fault.

It works just fine with 2.6.31.1

It's a USB modem "stick", no cables involved. Same symptom with another
stick from a co-worker. Both work fine on older kernels.

Cheers,
Ben.


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