Re: annoying frequent overcurrent messages.

[Arjan van de Ven]

On Thu, 2006-07-13 at 14:08 +0200, Pavel Machek wrote:
> Hi!
> 
> > > I have a box that's having its dmesg flooded with..
> > > 
> > > hub 1-0:1.0: over-current change on port 1
> > > hub 1-0:1.0: over-current change on port 2
> > > hub 1-0:1.0: over-current change on port 1
> > > hub 1-0:1.0: over-current change on port 2
> > ...
> > 
> > > over and over again..
> > > The thing is, this box doesn't even have any USB devices connected to it,
> > > so there's absolutely nothing I can do to remedy this.
> > 
> > Well, overcurrent is a potentially dangerous situation.  That's why it 
> > gets reported with dev_err priority.
> 
> Well, I see overcurrents all the time while doing suspend/resume...
> 
> Why is it dangerous? USB should survive plugging something that
> connects +5V and ground. It may turn your machine off, but that should
> be it...?

it's fun if your main storage resides near it on the same hub... 
like your suspend device
(now ok suspend-to-usb-disk is silly I suppose, but I can think of some
really cool usage models that that allows in an office-less office)

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/