Re: usb device not showing up

From: Alan Stern
Date: Thu Nov 06 2008 - 10:24:11 EST


On Thu, 6 Nov 2008, Norbert Preining wrote:

> Hi Alan,
>
> On Mi, 05 Nov 2008, Alan Stern wrote:
> > Well, this is a little odd. The trace shows the modem was detected and
> > enumerated correctly. But there's nothing corresponding to when you
> > loaded the hso driver. In fact, there's nothing after uhci-hcd
> > finished starting up and the unconnected root hubs were suspended.
>
> Strange. I will redo the thing and see if something changes the second
> time. I am quite sure I loaded hsom but of course without udev running
> (init=/bin/bash) no devices were created.
>
> > Did you look in /proc/bus/usb/devices at this point? And what about
> > the files in /sys/bus/usb/drivers/hso/?
>
> I don't remember, will redo it.
>
> > This suggests the problem may lie in the hso driver itself, or in a
> > failure to bind the driver to the device.
>
> Well, the point is that under these circumstances, as I explained,
> *there*is*no*problem*, I can use the device without any problems.

Oh. Well, you should rerun the test under circumstances in which there
_is_ a problem.

> Only when I turn of the computer and turn it on again the device simply
> does not show up in the usb system.

Okay, then do the test that way.

Alan Stern

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