生机后的问题

lenon

我得redhat9内核升级到kernel-2.6.13
升级完毕后总是提示usb驱动加载有问题
加了这段代码
needusbstorage=
if [ $usb = "1" ]; then
needusbstorage=`LC_ALL=C grep -e "^I.*Cls=08" /sys/bus/usb/devices 2>/dev/null`
action $"Initializing USB 1.1 host controller: " modprobe ohci-hcd 2> /dev/null
action $"Initializing USB HID interface: " modprobe hid 2> /dev/null
action $"Initializing USB keyboard: " modprobe usbkbd 2> /dev/null
action $"Initializing USB mouse: " modprobe usbmouse 2> /dev/null
fi
后提示没有此/sys/bus/usb/devices 目录，我看了系统却是没有该目录，请指点是啥原因