Messages in this thread | | | Subject | Re: usb devices get redetected all the time in 2.6.0-test{7,9} | From | Soeren Sonnenburg <> | Date | Thu, 30 Oct 2003 07:27:06 +0100 |
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On Wed, 2003-10-29 at 21:01, Greg KH wrote: > On Wed, Oct 29, 2003 at 08:15:26AM +0100, Soeren Sonnenburg wrote: > > Hi. > > > > When I attach a camera to a 2.4. based machine hotplug starts up some > > script to download images of that camera and fine thats it. > > > > In 2.6.0-testX I see kernel messages like: > > > > hub 2-0:1.0: new USB device on port 1, assigned address 2 > > bus usb: add device 2-1 > > bound device '2-1' to driver 'usb' > > bus usb: add device 2-1:1.0 > > bus usb: remove device 2-1:1.0 > > bus usb: add device 2-1:1.0 > > bus usb: remove device 2-1:1.0 > > bus usb: add device 2-1:1.0 > > bus usb: remove device 2-1:1.0 > > bus usb: add device 2-1:1.0 > > [...] > > > > and several of these hotplug scripts get started... Is this a wanted > > behaviour and something has to be fixed in userspace or is it a kernel > > bug ? > > Does this settle down after a bit, or does the add/remove stuff keep > going on for a while?
I realized that when I disable the hotplug script the camera is detected only once (as it should).
The script fetches the directory listing off the camera... thus is probably opening+closing the device once. So I wonder whether this could somehow trigger an usb disconnect on close() making the usb driver to redetect the device ?!
> Can you enable CONFIG_USB_DEBUG and see if you get any more information > in the kernel debug log as to why this is happening?
If still needed I will do.
Soeren
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