Solution to Ubuntu 12.04 Unity 3D failure

The solution to Ubuntu 12.04 Unity 3D failure suddenly burst into a whim. I played the dual screen with other people's monitors. As a result, I got a cup of =. = (B programmers always have problems with the system for a few days every month, so they get used to it.) Good Unity 3D has become Unity 2D, and my friends have gone through the same situation, finally, he gave up and chose to reinstall it. However, I personally feel that it is difficult to reinstall the System Configuration environment. Therefore, I am also excited to think about a ghost idea =. = Well, the key analysis process is: ----> the original good Unity 3D is changed to Unity 2D, and there is only one change in the Double screen setting: www.2cto.com/etc/X11/xorg. conf ----> all the friends I want to know about this situation will think about it. So I plan to change the configuration file back to the first version, unfortunately, I deleted all the configurations I added when setting the dual-screen, and restored them to the original format ..... Miserable reminder
At this moment, I am so worried: What if I delete this configuration file? ----> Remember that this configuration file is the product after the video card driver is installed, and there is no driver after the system is installed, so it's okay to delete it !! After consideration, I typed a command: sudo rm-rf/etc/X11/xorg. conf then knocked on the second article: After sudo reboot is restarted, the result is really excited. Unity 3D can be used normally, and the file should be reinstalled once, or the = parameter is ignored. = Anyway, I got a living worker utu. yeah ~ Author lqg1122