On Wed, 1 Aug 2012, James wrote:

> On 07/29/12 17:36, Alan Stern wrote:
> > On Sun, 29 Jul 2012, James wrote:
> > 
> >>>> It noticeably slows down booting.
> >>>
> >>> It shouldn't interfere appreciably with booting, unless you're waiting
> >>> for some other USB device to be detected.  All the USB communication
> >>> should happen in the background.
> >>
> >> It does wait until the UPS is stable, I don't know why.
> > 
> > I don't know why either.

> It doesn't slow my boot anymore but there are 9 disconnect-connects.
> I changed the port and recompiled the kernel.

That's progress.  Have you checked to see whether ehci-hcd is loaded 
before or after ohci-hcd?

Have you checked to see whether the disconnects occur if you plug the
UPS in after the system has booted?

Alan Stern

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