There are some error in /var/log/messages:
irattach: Failed to open /dev/ttyS2: No such file or directory
modprobe: modprobe: Can't locate module eth1
modprobe: modprobe: Can't locate module eth2
modprobe: modprobe: Can't locate module eth3
modprobe: modprobe: Can't locate module eth4
modprobe: modprobe: Can't locate module eth5
modprobe: modprobe: Can't locate module eth6
modprobe: modprobe: Can't locate module eth7
modprobe: modprobe: Can't locate module eth8
modprobe: modprobe: Can't locate module eth9
missing kernel or user mode driver usbcore
Can't locate module char-major-226
