This is a common issue right now; lots of people reporting it (see bug #638725, bug #608361, bug #616997). From bug #608361, Vish makes this recommendation, from the command line execute:
$ ubuntu-bug xserver-xorg-video-<driver>
where <driver> would correspond to the graphics card your system has.
Once you've done that, you need to "also affects" Unity. Then come back to this bug and add a comment with the new bug number.
Ikbel,
This is a common issue right now; lots of people reporting it (see bug #638725, bug #608361, bug #616997). From bug #608361, Vish makes this recommendation, from the command line execute: xorg-video- <driver>
$ ubuntu-bug xserver-
where <driver> would correspond to the graphics card your system has.
Once you've done that, you need to "also affects" Unity. Then come back to this bug and add a comment with the new bug number.
See his original comment here: /bugs.edge. launchpad. net/ubuntu/ +source/ unity/+ bug/608361/ comments/ 8
https:/
Thanks!