On Wed, 25 Jan 2006, aloncar wrote:

> I look stack trace and conclusion is similar like your explanation but i
> can't see any connection with ohci-hcd.

That's because you don't know how Linux's USB stack works.

At the time of the stack trace, the khubd process had called 
usb_control_msg and was waiting for the URB to finish.  There was a 
5-second timeout which must have expired, causing the URB to be unlinked.  
If the host controller driver were working correctly, it would have 
finished unlinking the URB and khubd would have continued.

There's more information available in the debugging files for ohci-hcd in 
the controller's sysfs directory.  However I don't understand that 
information so I can't help you figure out what's going wrong.

Alan Stern



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