I just installed Ubuntu 14.04 on my Asus N53TA notebook, but after the first reboot I got no video on the built-in display, although through the hdmi port everything works fine.

If I change the built-in display resolution (through a second monitor), the display turns on, and even if I change the resolution back to what it was, it keeps working fine (until the next reboot).

Other workaround I found is to deactivate and reactivate the built-in display on Ubuntu display settings, but again, it only works until the next reboot.

The problem doesn't happen when I run Ubuntu live cd.

Any ideas?