Fedora Linux

 Option 'Device' '/dev/input/mice'
 Option 'Protocol' 'IMPS/2'
 Option 'ZAxisMapping' '4 5' # Scrollwheel support
 Option 'Emulate3Buttons' 'yes' # L+R buttons count as middle
EndSection
Section 'InputDevice'
 Identifier 'Synaptics' # Laptop touchpad
 Driver 'synaptics'
 Option 'Device' '/dev/input/mice'
 Option 'Protocol' 'auto-dev'
 Option 'Emulate3Buttons' 'yes'
EndSection
Section 'Monitor'
 Identifier 'Monitor0'
 VendorName 'Monitor Vendor' # Just for reference
 ModelName 'LCD Panel 1400x1050' # Just for reference
 HorizSync 31.5 - 90.0 # Horiz. sync in kHz
 VertRefresh 59.0 - 75.0 # Vert. refresh in Hz
 Option 'dpms' # Enables power management
EndSection
Section 'Device'
 Identifier 'Videocard0'
 Driver 'nv'
 VendorName 'Videocard vendor' # Just for reference
 BoardName 'nVidia Corporation NV34M [GeForce FX Go5200]' # Ditto
EndSection
Section 'Screen'
 Identifier 'Screen0'
 Device 'Videocard0' # Associates the video card
 Monitor 'Monitor0' # with this monitor
 DefaultDepth 24 # Default is 24-bit colour
 SubSection 'Display'
  Viewport 0 0 # '0 0' is almost always used
  Depth 24 # This section used by default
  Modes '1400x1050' '1280x1024' '1024x768' '800x600' '640x480'
# Change modes with Ctrl-Alt-+/-
 EndSubSection
# This next SubSection is not selected by default (because of the
# DefaultDepth line in the previous section). However, it would be used if the
# -depth option was specified on the X server command line,
# overriding the DefaultDepth setting.
 SubSection 'Display'
  Viewport 0 0
  Depth 16 # Because default is 24-bit,
  Modes '800x600' '640x480' # ...this will usually be ignored
 EndSubSection
EndSection
Section 'DRI' # Configures DRI devices...
 Group 0 # Root (user ID 0) owns them
 Mode 0666 # Readable/writable by all
EndSection
Section 'Extensions'
 Option 'Composite' 'Enabled' # Enables transparency, etc.
EndSection

To change the default color depth, edit the DefaultDepth line in the Screen section (make sure that a SubSection for that depth exists in the Screen section of the file). Values that work with most video cards include 8, 16, and 24 bits; the number of colors available is 2^depth .

Similarly, the default resolution is controlled by the Modes entry in SubSection 'Display' with the same Depth as DefaultDepth .

For example, to change the configuration in this example from a 24-bit (16-million-color) to 16 bit (65,536 color) depth, and to change the resolution to 800x600, change the DefaultDepth to 16 and then change the Modes line in the SubSection for 16-bit color:

Section 'Screen'
 Identifier 'Screen0'
 Device 'Videocard0' # Associates the video card
 Monitor 'Monitor0' # with this monitor
 DefaultDepth 16
# Default is 16-bit colour
 SubSection 'Display'
  Viewport 0 0 # '0 0' is almost always used
  Depth 24 # This section used by default
  Modes '1400x1050' '1280x1024' '1024x768' '800x600' '640x480'
# Change modes with Ctrl-Alt-+/-
 EndSubSection
 SubSection 'Display'
  Viewport 0 0
  Depth 16
  Modes '800x600'
 EndSubSection
EndSection

The Composite extension, enabled in the Extensions section of the file, powers the use of advanced visual effects, including transparency. Not all video drivers support Composite .

2.4.3. What About...