I have had a look on series of similar topics but I could not find a right answer.

Currently, I bought laptop Dell latitude E6530 and installed Ubuntu 13.04 (64 bit) alongside with Windows 7 (I could not get rid of it because of some special programs for work).

Ubuntu worked well, however, it did not detect the external displays (Dell 23" and Dell 19") no matter I plugged them before or after booting.

Edited: I connected my laptop to those external displays through a laptop dock.

I went to Settings-> Display, the displays were there, but when I enabled them, Ubuntu logged off automatically. No external display was detected. In addition, the laptop screen sometimes was detected as Dell 23"

I got an advice from similar topic that nvidia driver should be updated to version 313 or 319. I upgraded driver and the unity launcher disappeared, main display resolution turned to 640*480 and none of external displays was detected.

I tried to use additional drivers, but when I turned it on, it told me that there was no driver to be used.

Could some one tell me what should I do ?

Edited : options vmwgfx enable_fbdev=1