After tarball restore my PC (tar xvfpz backup.tgz -C /), my sound card and network are not working. How to detect?

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http://askubuntu.com – I have a old laptop I installed Ubuntu 12.04 on. (It was ACER) I booted into single user mode and backed it up via cd / sudo -i tar cvpzf backup.tgz --exclude=/proc --exclude=/dev --exclude=/lost+found --exclude=/backup.tgz --exclude=/mnt --exclude=/sys / I installed a fresh copy of Ubuntu 1204 on my new laptop (It is Dell) I boot into single user mode I backup the existing /boot directory I untar my backup to restore on to the Dell sudo tar xvfpz backup.tgz -C / I restore the previous /boot directory again I boot it up, and my profile and settings are loaded ok but, Ubuntu shows that the (HowTos)