0
votes
1answer
335 views

How can I disable screen blanking without /etc /X11/xorg.conf on Nvidia Optimus laptop

I'm running Ubuntu 12.04, 64 bit, kernel Linux 3.5.0-39-generic, on a system that has an Nvidia GE Force GT 640m / Intel HD graphics 4000 - 1.0 GB graphics processor assembly. In order to get the ...
2
votes
0answers
311 views

Random black dot on the screen

black dots, or more something like this _-, apprear on my screen, but only in windows, not on the side bar. It is very anoying since it apprear every 30 sec and sometime every 5 sec in row. I have ...