Re: khubd timed out on ep0in len=0/64 with 3.4 kernel

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On Thu, 31 Oct 2013, Prasad Koya wrote:

> I tried usbmon before forcing crash:

> As this USB is on bus 1, I tried below:
> 
> cat /sys/kernel/debug/usb/usbmon/1u
> 
> I didn't see anything till I copied a file or did some activity on it.
> While cat'ing above, I copied a file to that flash with dd in another
> terminal and I got this:

...

> But I'm seeing the issue in early boot. So is there any other way to
> get the usbmon traces out?

That makes it more difficult.  You can't use usbmon during early boot, 
so your only option is to enable CONFIG_USB_STORAGE_DEBUG.  The output 
is more verbose, but we should be able to see what's going on.

Alan Stern

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