I have upgraded my wifes netbook (Novatech X10) from 10.04 to 12.04 and hit the same problem I had with 11.04 and 11.10 with th blank screen on boot. I can fix this by adding the nomodeset option to grub but this seems to make the graphics experience slightly worse (it does not seem as clear) also the web browsers firefox/chrome do not render the screen width correctly.
Currently I am working around it by not setting nomodeset and telling my wife to close the lid after boot and reopen it (the screen then works) but she is complaining about this and wishing "I had not messed with it"
Any ideas at all?
lspci shows the controller as intel Corporation N10 Family Integrated Graphics Controller" I have not installed any other drivers, and the additional drivers search did not find any.