I added the lines, and restarted X, but no immprovement. So I restarted the system and still no improvement. This is my xorg.conf: [dotancohen@localhost ~]$ cat /etc/X11/xorg.conf # Xorg configuration created by pyxf86config Section "ServerLayout" Identifier "Default Layout" Screen 0 "Screen0" 0 0 InputDevice "Keyboard0" "CoreKeyboard" InputDevice "Synaptics" "CorePointer" EndSection Section "InputDevice" Identifier "Keyboard0" Driver "kbd" Option "XkbModel" "pc105" Option "XkbLayout" "us" EndSection Section "InputDevice" Identifier "Synaptics" Driver "synaptics" Option "UseShm" "true" Option "Device" "/dev/input/mice" Option "Protocol" "auto-dev" Option "Emulate3Buttons" "yes" EndSection Section "Device" Identifier "Videocard0" Driver "vesa" EndSection Section "Screen" Identifier "Screen0" Device "Videocard0" DefaultDepth 24 SubSection "Display" Viewport 0 0 Depth 24 EndSubSection EndSection