On Wed, 26 Aug 2009 16:04 +0530, "aditya uttam" <uttam.aditya@xxxxxxxxx> wrote: > While testing my USB driver with READ operations, system gets hanged > and log(var/log/messages) file is not updated completely after reboot. > > Is there any other way of debugging method apart from printks? printk is fine. To avoid the problem of the messages not making it to disk because of a crash, collect them on a separate machine via serial console or netconsole. It also helps if you switch to a text console before you start your test. Then you can at least copy the panic message from the screen by hand or with a digicam. HTH T. -- Tilman Schmidt tilman@xxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html