RE: issues getting I/O device to work with udev....

[Kay Sievers <kay.sievers@vrfy.org>]

On Fri, 2006-08-25 at 13:38 +0200, Jan Zwiegers wrote:
> > > fact that the device gets created under /dev/edredaq/device0-99. This
> > rules
> > > worked just fine on previous systems, but suddenly it started to fail on
> > > newer distros.

> > > Can you guys maybe point me to a solution?
> > 
> > Hmm, what exactly is the problem? What suddenly started to fail?
> > Can you paste the output of 'udevmonitor' when you load the kernel
> > module? Or the output when connect the USB device, if you only have it
> > built-in.

> The node /dev/edredaq/device0 never get created, or it does not show up in
> the file system (maybe it's permission / security related). Unfortunately I
> have left work already and cannot do the 'udevmonitor' for you. 

Oh, that all sounds very much like you don't use the right driver core
functions and you create the "dev" file yourself in sysfs. You must use
the right functions in the kernel and pass the correct dev_t to the
device registration. That will automatically create the "dev" file and
add the needed data to the uevent environment, to let udev create the
node.

But again, to verify this, we need the output of "udevmonitor --env",
while you plug in a device or re-trigger the event by writing "add" to
the "uevent" file in the sysfs device directory.

Kay 


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