Beagle Board rev. C USB problems

I ask your help to fix the annoying USB problems that I'm encountering while I'm trying to configure Linux on the BeagleBoard [url removed, login to view] bought from Special Computing. The problems are related to the USB ports and/or devices attached to the BeagleBoard through the HUB. I've tried two different kinds of HUB : the shintek HUB (code FHUB401,model 4 PORTS HUB USB MINI, RUBBER COATED) : [url removed, login to view] and the ednet HUB : [url removed, login to view],80,2&artnr=85132 Problems arise when I try to boot the BeagleBoard with the HUB and the devices (mouse,keyboard) attached,because randomly it reboots. Sometime Linux is able to boot properly,but then a lot of errors make very hard for me to continue working. The errors gone away if I make the boot of the BeagleBoard without any USB device attached. I attach the HUB through an USB Mini-A to USB A Female OTG Cable. Briefly,this is the procedure followed to install Ubuntu on the SD card : wget [url removed, login to view] tar xJf [url removed, login to view] cd ubuntu-11.04-r0-minimal-armel sudo ./[url removed, login to view] --mmc /dev/sdX --uboot beagle This is a screenshot that shows what happens before the Beagle Board was able to boot : [url removed, login to view]@N03/5756028742/in/photostream [url removed, login to view]@N03/5756206848/in/photostream Please note that I'm connected to the BeagleBoard through a serial connection. If you are experienced with this let me know,I can setup a SSH account for you. Thanks.

組み込みソフト エンジニアリング Linux

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