[ubuntu] Ubuntu 13.04 boots into black screen on acer aspire M3

Hi all,

I finished the installation of ubuntu 13.04 on a Acer aspire M3-581PTG (with NVIDIA GeForce GT 730M).
When choosing the default startup, the screen gets black but I can still hear the login sound.
If I opt for a startup in failesafeX from the recovery menu, I end up with the error:

Fatal server error:
no screens found (EE)

And if I take the "resume" option from the recovery menu, I fall back on the terminal with this message:

login: initctl: Event failed

I tried (re)installing nVidia drivers, but nothing seems to work. Does anyone has good advice on this?

Thanks,
Tom