Re: ehci_hcd related S3 lockup on ASUS laptops, again

[Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>]

On Fri, 13 Apr 2012, Steven Rostedt wrote:

> On Fri, 2012-04-13 at 10:10 -0400, Alan Stern wrote:
> > On Thu, 12 Apr 2012, Alan Stern wrote:
> > 
> > > Tomorrow I'll look through the code more carefully; with those changes
> > > there really is very little difference between the two cases.  Things
> > > like mmio mappings and IRQs requested; they shouldn't cause a crash.
> > 
> > Let's start with some basic information.  First, before suspending,
> > what shows up in /sys/kernel/debug/usb/devices?
> 
> Attached (after gzipping it).

Okay, you've got Bluetooth device and a USB webcam, in addition to the 
internal "rate-matching" hub on each EHCI bus.

> > Second, if you do
> > 
> > 	echo 0 >/sys/bus/usb/devices/usb1/bConfigurationValue
> 
> This never returned. I did the echo, and the command locked up.
> 
> (process 3077)
> 
> cat /proc/3077/wchan 
> usb_disconnect

I just did the same thing here, with the same result.  I'm trying to
track it down now.  It may take a while...

Alan Stern

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