fbdev - video driver for framebuffer device
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 configu-
rations are supported.
The fbdev driver supports all hardware where a framebuffer driver is available. fbdev
uses the os-specific submodule fbdevhw(4x) to talk to the kernel device driver. Currently
a fbdevhw module is available for linux.
Please refer to XF86Config(5x) for general configuration details. This section only cov-
ers 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 "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
degrees). Implies use of the shadow framebuffer layer. Default: off.
XFree86(1), XF86Config(5x), xf86config(1), Xserver(1), X(7x), fbdevhw(4x)
Authors include: Gerd Knorr, Michel Danzer, Geert Uytterhoeven
XFree86 Version Version 4.3.0 FBDEV(4x)