I've tested udev and it works. udev rule is the good walk around for now..<br><br>JAK<br><br><div class="gmail_quote">On Thu, Jul 9, 2009 at 5:14 PM, Greg KH <span dir="ltr"><<a href="mailto:greg@kroah.com">greg@kroah.com</a>></span> wrote:<br> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="im">On Thu, Jul 09, 2009 at 11:54:53PM +0100, Dan wrote:<br> > Roberto De Ioris wrote:<br> > > I do not know why hp and samsung has made this decision, but on linux is<br> > > a pain in the ass setting a configuration for usb devices as the host<br> > > controller driver get the most useful one using an (IMHO totally wrong)<br> > > algorithm.<br> > ><br> > > The only (raw) solution i found is to unload the usbhid module, then set<br> > > the first configuration for the usb device using /sys (look for the file<br> > > bConfigurationValue, it must contain '1' and not '2') and then reload<br> > > the displaylink module.<br> > ><br> > > I must admit that i have no experience on multiple configuration usb<br> > > device, so probably someone could point me to a real solution.<br> > ><br> > Bernie's given a very thorough rationale for the basis of this design -<br> > it does make a bit harder for linux unfortunately.<br> ><br> > The libdlo code calls usb_detach_kernel_driver_np, this in turn calls<br> > <a href="http://lxr.linux.no/linux+v2.6.30/drivers/usb/core/devio.c#L1465" target="_blank">http://lxr.linux.no/linux+v2.6.30/drivers/usb/core/devio.c#L1465</a> .<br> ><br> > Maybe you can use this code? As a VID/PID match your probe call should<br> > trump the HID class driver, and when the driver loads it should be able<br> > to dislodge an existing driver.<br> <br> </div>Nope, Linux doesn't work that way :(<br> <br> We need to patch the hid driver and add these devices to the blacklist.<br> Hopefully displaylink will provide me a list of the ids to blacklist and<br> that will solve the problem.<br> <br> thanks,<br> <br> greg k-h<br> <div><div></div><div class="h5">_______________________________________________<br> Libdlo mailing list<br> <a href="mailto:Libdlo@lists.freedesktop.org">Libdlo@lists.freedesktop.org</a><br> <a href="http://lists.freedesktop.org/mailman/listinfo/libdlo" target="_blank">http://lists.freedesktop.org/mailman/listinfo/libdlo</a><br> </div></div></blockquote></div><br>