linux-kernel - Re: pm_op(): usb_dev_suspend+0x0/0x10 returns -2 on USB device 8087:0020

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Message-ID: <4B8FBBBA.8070308@maroy.hu>
Date:	Thu, 04 Mar 2010 14:55:06 +0100
From:	Ákos Maróy <akos@...oy.hu>
To:	Alan Stern <stern@...land.harvard.edu>
CC:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Kernel development list <linux-kernel@...r.kernel.org>,
	Greg KH <gregkh@...e.de>, USB list <linux-usb@...r.kernel.org>
Subject: Re: pm_op(): usb_dev_suspend+0x0/0x10 returns -2 on USB device 8087:0020

Alan,

in this thread, earlier I wrote:

>> By the way, I noticed above that you have xhci-hcd installed.  As far 
>> as I know, that driver does not yet support system suspend.  You should 
>> try unloading xhci-hcd before doing the suspend (both with and without 
>> CONFIG_USB_DEBUG).
> 
> wow, rmmod xhci - and the suspend goes through fine!

now, I re-installed the system, and suspend doesn't work anymore.

if I have the xhci module loaded, it fails and returns to the screen
right away.

if I unload the xhci module, I get to the character console, and then
the machine hangs there - nothing happens anymore. only a power cycle helps.

I don't know what was different when at least suspend worked :(

I'll try to do some more debugging..


Akos

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