I had the driver installed and working (without it I was not able to get sounds through HDMI). Today something happened and the desktop zoomed in so that bars went out of the screen.
By disabling the driver, I was able to restore the full screen but no more audio :-(
I installed the driver back, and video zoomed in again.
I guess it's some conflict with some updates ubuntu installed automatically but I have no idea what to do to try fix it... What can I do?