linux-kernel - Re: annoying frequent overcurrent messages.

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Message-Id: <200607150654.36154.a1426z@gawab.com>
Date:	Sat, 15 Jul 2006 06:54:36 +0300
From:	Al Boldi <a1426z@...ab.com>
To:	Pavel Machek <pavel@....cz>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: annoying frequent overcurrent messages.

Pavel Machek wrote:
> On Thu 13-07-06 23:50:55, Al Boldi wrote:
> > On Thu, 2006-07-13 at 14:08 +0200, Pavel Machek wrote:
> > > > > 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...?
> >
> > I don't want to sound alarming here, but I just had a USBFlashStick
> > fried by a machine, while in suspend-to-ram running 2.6.17.
>
> Well, I have one usb sticdk fried by regular use under linux (like --
> 5 minutes of regular use!) and another fried by my dad on windows. So
> these beasts are crap.
>
> > I am blaming hw, but does anybody know how I can get my data back?
>
> Probably not easily. Specialized shop might desolder flash chip and
> read it directly... or you may try swapping flash chip into
> 'not-yet-fried' stick...

Or there is (should be) a fuse?

Thanks!

--
Al

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