I upgraded to Ubuntu 14.04 on my noutbook Acer 3820tg.
System is mostly usable but following annoying problems exist:

1) black screen when running System Parameters;
2) random black occurs screen during power on or resume from hibernate. The system is not halted but there is a black screen. I can still do software reboot.

The problem might be connected with hybrid graphics (ATI + discreet)
I have already filled a bugreport:

Any suggestions on the issue?