Problem with driver 331.89 in Ubuntu (GeForce 705M)

I have a mini pc with GeForce 705M running under Ubuntu 14.10. With the propetary driver, everything is working fine, but I cannot rotate the screen: I try with metamodes, Rotate configuration in the config, but nothing is working at all.

Anyone know any solution? I do deeply searches in the net, but no solution at all.

Thank you,