Re: ehci_hcd related S3 lockup on ASUS laptops, again

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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).

> 
> 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

-- Steve


> 	echo 0 >/sys/bus/usb/devices/usb2/bConfigurationValue
> 
> before suspending (using a vanilla kernel and no script), does it 
> change the behavior?  I expect it won't, but we should check just to be 
> thorough.
> 
> Alan Stern

Attachment: devices.gz
Description: GNU Zip compressed data

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