fbdev man page on aLinux

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FBDEV(4)							      FBDEV(4)

       fbdev - video driver for framebuffer device

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

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

       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

       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 sec‐
       tion 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  sec‐
       tion.   See above for a sample line.  You can use " -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:

       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.

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

       Authors include: Gerd Knorr, Michel Dänzer, Geert Uytterhoeven

X Version 11		    xf86-video-fbdev 0.4.0		      FBDEV(4)

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