Re: [linux-pm] ehci_hcd related S3 lockup on ASUS laptops, again

[Alan Stern <stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz@public.gmane.org>]

On Wed, 18 Apr 2012, Steven Rostedt wrote:

> On Wed, 2012-04-18 at 16:23 -0400, Alan Stern wrote:
> 
> > In the meantime, just to be certain of the diagnosis, here's a
> > different patch for you guys to try.  This will test the ehci-hcd
> > unbound path (i.e., use it with the script).  The patch removes the
> > line that sets the dev->current_state to PCI_UNKNOWN when the driver is
> > unbound.  Thus current_state will remain equal to PCI_D0, so
> > pci_prepare_to_sleep should put the controllers into D3, which we
> > expect will cause a crash.
> 
> Confirmed. The suspend locked up even with the script.

Okay, now I'm certain that this is the problem.

> > Please try this both with and without pm_test set to "platform", and 
> > post the debugging dmesg output from whichever cases the computer 
> > survives.
> > 
> 
> Below is the dmesg output after running with pm_test set to "platform".

The part you included didn't show the suspend itself.  It looks like a 
bunch of stuff following the resume.  But I guess it doesn't much 
matter, since we now know what needs to be fixed.

Alan Stern

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