Am Donnerstag, 24. Mai 2007 16:13 schrieb Alan Stern:
> On Thu, 24 May 2007, Oliver Neukum wrote:
>
> > > Am Donnerstag, 24. Mai 2007 14:25 schrieb Sam Liddicott:
> > > Recompiled and:
> > > # CONFIG_USB_SUSPEND is not set
> > >
> > > Same problem, and still get the:
> > >
> > > usb usb2: suspend_rh (auto-stop)
> >
> > Odd, even impossible. Did you replace all USB modules?
>
> Not at all. uhci-hcd automatically shuts off (auto-stops) root hubs to
> which no device is connected. It does this even when
> CONFIG_USB_SUSPEND isn't set, in order to reduce the DMA load.
>
> It's not clear whether this is connected to Sam's problem. Yes, usb2
> is stopping, but the FTDI devices are attached to usb1 so in theory it
> shouldn't matter. In practice, you never know...
I don't believe in coincidencies. It is worth checking out.
If it isn't fixable that way, an usbmon trace will likely be needed.
Regards
Oliver
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