From: Justin Piszcz
Date: Sun Oct 19 2008 - 12:51:42 EST

On Sun, 19 Oct 2008, Oliver Neukum wrote:

You should turn on the usbfs_snoop module parameter for usbcore and see
what shows up in the system log.

Alan Stern

Tried this, kernel would not boot up any further when I had that enabled
alongside the 'extra' debugging options in the kernel:

My netconsole is not working right at the moment either so I was not
able to pull a sysrq-of this, but it hung twice, once on one device, rebooted
then it hung on another device the second time.

Please get sysrq-t of a hang.


Before I tried the above, I was able to get a sysrq-t of the hang:


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