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.  Mandatory  for  24bpp
              framebuffers on newer servers. 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.  Disabled  for  24bpp
              framebuffers. Default: off.

SEE ALSO

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

AUTHORS

       Authors include: Gerd Knorr, Michel Dänzer, Geert Uytterhoeven