MirBSD manpage: fbdev(4)

FBDEV(4)            UNIX Programmer's Manual             FBDEV(4)


     fbdev - video driver for framebuffer device


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


     fbdev is an XFree86 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.


     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.


     Please refer to XF86Config(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 config-

     For PCI boards you might have to add a BusID line to the
     Device section.  See above for a sample line.  You can use
     "XFree86 -scanpci" to figure out the correct values.

     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

XFree86                   Version 4.5.0                         1

FBDEV(4)            UNIX Programmer's Manual             FBDEV(4)

          degrees). Implies use of the shadow framebuffer layer.
          Default: off.


     XFree86(1), XF86Config(5), xf86config(1), Xserver(1), X(7),


     Authors include: Gerd Knorr, Michel Danzer, Geert Uytterhoe-

XFree86                   Version 4.5.0                         2

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