For avoiding the flickering problem, you can follow the steps given below
First you have to make a copy of xorg.conf - I prefer using the days date in this format (YYMMDD)
Code:
sudo cp /etc/X11/xorg.conf /etc/X11/xorg.conf.backup<date>
After that open the xorg.conf for the purpose of editing.
Code:
sudo gedit /etc/X11/xorg.conf
After I have added the following code to the Device section under the driver
Code:
Section "Device"
........
Option "VideoOverlay" "off"
Option "OpenGLOverlay" "on"
Option "TexturedVideo" "off"
.........
EndSection
Now save the file and restart you system hope this will work.
If this changes breaks, you X-boot in the recover command line from the Grub then do the following
Code:
sudo cp /etc/X11/xorg.conf.backup<date> /etc/X11/xorg.conf
If you cannot remember the name of the backup, or you want to switch to a different xorg.conf then do a directory listing that will list all the files.
Now reboot.
Hopefully this helps!
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