I think the problem may be incorrect handling of the default "boot protocol" for the usb mouse. If so, I have a new kernel which should fix it. Please could you try this:
1. Download http://plan9.bell-labs.com/sources/contrib/miller/9pi and copy it to the DOS partition on your SD card. 2. Restore the original cmdline.txt if you've been experimenting with it (by copying from cmdline-demo.txt), and try booting. If the mouse cursor still doesn't move, 3. Edit cmdline.txt and add the parameter 'kbargs=-b' to force the use of the boot protocol. Is that better?
