USB debugging with usbmon

To enable usbmon in the 2.6.x kernel, follow these
steps :-

1) Compile the USB_MON module (Device Drivers / USB
Support / USB Monitor) or compile it into the kernel
2) Enable debugfs in the kernel, rebuild the kernel
and reboot using the new kernel
3) mount -t debugfs none_debugs /sys/kernel/debug
4) modprobe usbmon
5) Find the Bus to which the USB device connects (cat
/proc/bus/usb/devices and look for the 'T:' line which
gives the bus number
6) cat /sys/kernel/debug/usbmon/<Bus Number>t >
/tmp/Bus<Bus Number>.txt (NOTE : It's <Bus Number>t,
not just <Bus Number>)
7) Use the USB device
8) Kill the 'cat' command
9) Examine the file /tmp/Bus<Bus Number>.txt

Read /usr/src/linux/Documentation/usb/usbmon.txt to
decode the output :-)



Peter


-------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642