On Wed, 5 Sep 2007, Mattias Nissler wrote:

quoted text
> Hey, I got another suspicion: Have you noticed that the UHCI and EHCI
> controller suspend/resume in different order in the two logs?

Not quite correct.  The controllers (1d.0 and 1d.7) are in the same 
order, because that is determined by the PCI stack.  However the root 
hubs (usb2, usb3, etc.) _are_ in a different order because it is 
determined by the USB stack.

quoted text
>  That is
> probably because after I had made ehci-hcd a module, it was loaded
> after.

Yes, it is.

quoted text
>  In my syslog I have verified that ehci is loaded before uhci when
> both are compiled in. Does that sound sensible? At least both drivers
> talk to interrelated hardware...
> 
> I'll try to compile them both as modules and control the load order.

Okay.  It may not be the order itself so much as the time delay 
between resuming the controller and resuming the root hub.  Since the 
controllers get resumed in the same order, the delays are different.

Alan Stern


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