I have build a special version of the power-user kernel with USB debugging and verbose enumeration enabled, and the USB blacklist disabled (w/o whitelist it ended up in a reboot loop). Modules for all common USB device classes are already included (for USB/IP). I hope it can help you to get USB hostmode working on the N900. download and install in this order http://maemory.com/N900/kernel/testi...mo28_armel.deb http://maemory.com/N900/kernel/testi...mo28_armel.deb http://maemory.com/N900/kernel/testi...mo28_armel.deb the kernel configuration is http://maemory.com/N900/kernel/testi...ower_defconfig good luck!