I am trying to plug a USB 2 device in a USB 3 slot. Nothing is being detected in "lsusb". Is there something special I need to do? I am running centos 5.5 x86_64. I thought 3.0 was backward compatible. Nothing special about my device its an RS232 to USB device. It works in 2.0 slot. Thanks, Jerry _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos