To fix high CPU usage caused by graphic driver

Hardware acceleration can cause high CPU usage with some graphic drivers. Usually this can happen on an old computer and driver like savage.

1. Make a /etc/X11/xorg.conf file

sudo Xorg :1 -configure

PS. Ignore the error messages

sudo cp xorg.conf.new /etc/X11/xorg.conf

2. Edit the /etc/X11/xorg.conf file

sudo nano /etc/X11/xorg.conf

… add the next line to the device section

Option "NoAccel" "True"

… save, quit and reboot

Ctrl o
Ctrl x

An example about whole section:

Section "Device"
Option "NoAccel" "True"
Identifier "Card0"
Driver "intel"
BusID "PCI:0:2:0"
EndSection