I have problem with new Laptop Lenovo T420 (I5), if I boot using live CD all drivers and every thing is ok, once boot from hard disk, the fresh Ubuntu installed by the same CD, all drivers are missing. display,wired and wireless network.
I try to install it multiple time and the same issue, changing the CD with new downloadable .ISO
The same case after instillation, all it's missing drivers.
I will not mention the upgrade kernel since with live CD all drivers are working fine.