Re: Re: [linux-usb-devel] kernel 2.6.10 , uhci-hcd problem after ACPI S3 suspend.

[Paul Ionescu <i_p_a_u_l-/E1597aS9LQAvxtiuMwx3w@public.gmane.org>]

Hi Alan,

Yes, I think it works as you expected.
I have CONFIG_USB_SUSPEND and CONFIG_USB_DEBUG, and
the behaviour is:

If ehci-hcd is not loaded but only uhci-hcd, suspend
and resume works just fine with and without USB
devices plugged in.

If ehci-hcd and uhci-hcd is loaded , suspend and
resume works as expected if there is no USB device
plugged at suspend/resume time, or if there are both
uhci (USB 1/1.1) and ehci (USB 2) devices. 
If there are only uhci devices (USB 1/1.1) when
suspending, they are not seen upon resume, unless I
unplug/replug them again.

Hmmm, interesting.


Thanks,
Paul

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

> On Wed, 5 Jan 2005, Paul Ionescu wrote:
> 
> > Hi Alan,
> > 
> > I just compiled a new kernel with both
> > CONFIG_USB_SUSPEND and CONFIG_USB_DEBUG, and now
> it
> > works if nothing is plugged in USB when I suspend
> the
> > machine.
> > If I have something plugged in at suspend time,
> after
> > resume it is not there anymore, and I have to
> > pull/plug the device again.
> 
> Just out of curiosity, does the same thing happen
> with CONFIG_USB_SUSPEND 
> if you rmmod ehci-hcd before suspending?  Does a
> device plugged in to the 
> UHCI controller continue to work after you resume?
> 
> Alan Stern
> 
> 



		
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