Detecting USB over-current

Detecting USB over-current

[Luis Felipe Strano Moraes]

Hello,

I've been searching if it's possible to receive an event on udev regarding
over-current on a USB port, but so far have been unable to find anything.

Does anyone have any ideas about how I can do this?

Best regards,
--lf


-- 
"I believe in looking reality straight in the eye and denying it." --
Garrison Keillor

Re: Detecting USB over-current

[Kay Sievers]

On Mon, Jul 19, 2010 at 23:47, Luis Felipe Strano Moraes
<luis.strano@gmail.com> wrote:
> I've been searching if it's possible to receive an event on udev regarding
> over-current on a USB port, but so far have been unable to find anything.
>
> Does anyone have any ideas about how I can do this?

Udev does not provide anything like this, and is unlikely the right
place to add support for things like this.

Better ask at the linux-usb list if you can somehow watch devices for
this state.

Kay

Re: Detecting USB over-current

[Jim Paris]

Kay Sievers wrote:
> On Mon, Jul 19, 2010 at 23:47, Luis Felipe Strano Moraes
> <luis.strano@gmail.com> wrote:
> > I've been searching if it's possible to receive an event on udev regarding
> > over-current on a USB port, but so far have been unable to find anything.
> >
> > Does anyone have any ideas about how I can do this?
> 
> Udev does not provide anything like this, and is unlikely the right
> place to add support for things like this.
> 
> Better ask at the linux-usb list if you can somehow watch devices for
> this state.

There was some relatively recent discussion about this on linux-usb here:
  http://thread.gmane.org/gmane.linux.usb.general/27802/focus'991

-jim

Re: Detecting USB over-current

[Kay Sievers]

On Tue, Jul 20, 2010 at 15:11, Jim Paris <jim@jtan.com> wrote:
> Kay Sievers wrote:
>> On Mon, Jul 19, 2010 at 23:47, Luis Felipe Strano Moraes
>> <luis.strano@gmail.com> wrote:
>> > I've been searching if it's possible to receive an event on udev regarding
>> > over-current on a USB port, but so far have been unable to find anything.
>> >
>> > Does anyone have any ideas about how I can do this?
>>
>> Udev does not provide anything like this, and is unlikely the right
>> place to add support for things like this.
>>
>> Better ask at the linux-usb list if you can somehow watch devices for
>> this state.
>
> There was some relatively recent discussion about this on linux-usb here:
>  http://thread.gmane.org/gmane.linux.usb.general/27802/focus'991

Yeah, that happens quite often, but for many reasons it's totally
wrong to use uevents for error reporting or anything not related to
very basic device state changes, just because nobody provides any
appropriate infrastructure to get errors from the kernel to userspace.
:)

Kay