Re: root hub lost power or was reset

[Justin P. Mattock]

On 12/03/09 07:16, Alan Stern wrote:
> On Thu, 3 Dec 2009, Oliver Neukum wrote:
>
> > Am Donnerstag, 3. Dezember 2009 01:58:46 schrieb Justin P. Mattock:
> > > > > Now looking at dmesg I see:
> > > > >
> > > > > [ 413.551845] uhci_hcd 0000:00:1d.0: PCI INT A ->  GSI 23 (level, low)
> > > > > ->  IRQ 23
> > > > > [ 413.551855] uhci_hcd 0000:00:1d.0: setting latency timer to 64
> > > > > [ 413.551887] usb usb2: root hub lost power or was reset
> > > >
> > > > Is that unexpected? It seems reasonable to me..
> > >
> > > honestly I can't remember seeing this or not.
> > > if this is normal then I'll leave it as is.
> >
> > This happens if your system cuts power to USB during S2.
>
> It also happens if the system retains power but resets the controller
> while resuming (as indicated by the log message: "lost power or was
> reset".)  Again, it's a BIOS thing.
>
> And it seems to be very widespread.  I haven't seen more than a handful
> of systems which _don't_ cut power or reset their UHCI controllers
> during S3 sleep.
>
> Alan Stern


Thanks for all the info on this.
Well, s2ram works ended up being
isight_firmware for some reason
or another. As for the reset
it is a macbook, so if theres something wrong
with the bios, then this makes sense
(something with efi);

In any case everything else seems o.k.
Thanks again for the info.

Justin P. Mattock


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