harold 
Hi, In the stock bootloader, I am now unable to download anything (like a kernel) through USB into NAND. Under Windows, the dnw tool just hangs. Under Linux, the s3c241_boot_usb tool bombs. Upon further investigation the return error from libusb is -19. If this is interpreted as the system errno, then it is ENODEV. Prior to downloading, the board shows up in lsusb as: Bus 002 Device 019: ID 5345:1234 Owon PDS6062T Oscilloscope Ignoring the text description, the numbers are correct. After attempting the download (and having the download bomb), the board does not show up at all under lsusb. So ENODEV would seem to be the correct interpretation. There is however this: Feb 5 13:34:38 itsy kernel: [ 1100.992190] usb 2-2: device not accepting address 24, error -71 Feb 5 13:34:38 itsy kernel: [ 1100.992244] hub 2-0:1.0: unable to enumerate USB device on port 2 -71 would seem to be EPROTO. I have a micro2440+SDK, 1G NAND. Anyone have any ideas? Is my board hosed? It used to work perfectly (couldn't load u-boot but that's another story). Thanks, -harold