FBDEV(4) (xf86-video-fbdev 0.5.0) FBDEV(4)
NAME
fbdev - video driver for framebuffer device
SYNOPSIS
Section 34Device34
Identifier 34devname34
Driver 34fbdev34
BusID 34pci: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 config-
ured.
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 34fbdev34 34string34
The framebuffer device to use. Default: /dev/fb0.
Option 34ShadowFB34 34boolean34
Enable or disable use of the shadow framebuffer layer.
Mandatory for 24bpp framebuffers on newer servers.
Default: on.
Option 34Rotate34 34string34
Enable rotation of the display. The supported values
Page 1 X Version 11 (printed 5/24/22)
FBDEV(4) (xf86-video-fbdev 0.5.0) FBDEV(4)
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 D:anzer, Geert Uytterho-
even
Page 2 X Version 11 (printed 5/24/22)