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man page of fbdev

fbdev: video driver for framebuffer device


fbdev - video driver for framebuffer device


Section "Device" Identifier "devname Driver "fbdev" BusID "pci:bus:dev:func ... EndSection
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.
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 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. You can use "Xorg -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 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 Danzer, Geert Uytterhoeven FBDEV(4)

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