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fbdev(4)


NAME

   fbdev - video driver for framebuffer device

SYNOPSIS

   Section "Device"
     Identifier "devname"
     Driver "fbdev"
     BusID  "pci:bus:dev:func"
     ...
   EndSection

DESCRIPTION

   fbdev  is  an  Xorg  driver  for  framebuffer  devices.  This is a non-
   accelerated driver, the following framebuffer depths are supported:  8,
   15,  16, 24.  All visual types are supported for depth 8, and TrueColor
   visual is supported for the other  depths.   Multi-head  configurations
   are supported.

SUPPORTED HARDWARE

   The  fbdev  driver  supports all hardware where a framebuffer driver is
   available.  fbdev uses the os-specific submodule fbdevhw(4) to talk  to
   the  kernel device driver.  Currently a fbdevhw module is available for
   linux.

CONFIGURATION DETAILS

   Please refer to xorg.conf(5) for general configuration  details.   This
   section only covers configuration details specific to this driver.

   For  this  driver  it  is  not  required to specify modes in the screen
   section of the config file.  The fbdev driver can pick up the currently
   used  video  mode  from the framebuffer driver and will use it if there
   are no video modes configured.

   For PCI boards you might have  to  add  a  BusID  line  to  the  Device
   section.  See above for a sample line.

   The following driver Options are supported:

   Option "fbdev" "string"
          The framebuffer device to use. Default: /dev/fb0.

   Option "ShadowFB" "boolean"
          Enable or disable use of the shadow framebuffer layer.  Default:
          on.

   Option "Rotate" "string"
          Enable rotation of the display. The supported  values  are  "CW"
          (clockwise,  90  degrees),  "UD"  (upside down, 180 degrees) and
          "CCW" (counter clockwise,  270  degrees).  Implies  use  of  the
          shadow framebuffer layer.   Default: off.

SEE ALSO

   Xorg(1), xorg.conf(5), Xserver(1), X(7), fbdevhw(4)

AUTHORS

   Authors include: Gerd Knorr, Michel Dnzer, Geert Uytterhoeven



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