NAME

       modesetting - video driver for framebuffer device

SYNOPSIS

       Section "Device"
         Identifier "devname"
         Driver "modesetting"
         BusID  "pci:bus:dev:func"
         ...
       EndSection

DESCRIPTION

       modesetting  is an Xorg driver for KMS devices.  This driver supports TrueColor visuals at
       framebuffer depths of  15,  16,  24,  and  30.  RandR  1.2  is  supported  for  multi-head
       configurations.  Acceleration  is available through glamor for devices supporting at least
       OpenGL ES 2.0 or OpenGL 2.1.  If glamor is not enabled, a shadow framebuffer is configured
       based  on  the  KMS  drivers'  preference (unless the framebuffer is 24 bits per pixel, in
       which case the shadow framebuffer is always used).

SUPPORTED HARDWARE

       The modesetting driver supports all hardware where a KMS driver is available.  modesetting
       uses the Linux DRM KMS ioctls and dumb object create/map.

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  modesetting  driver can pick up the currently used video mode from the kernel
       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.

       The following driver Options are supported:

       Option "SWcursor" "boolean"
              Selects software cursor.  The default is off.

       Option "kmsdev" "string"
              The framebuffer device to use. Default: /dev/dri/card0.

       Option "ShadowFB" "boolean"
              Enable or disable use of the shadow framebuffer layer.  Default: on.

       Option "DoubleShadow" "boolean"
              Double-buffer  shadow updates. When enabled, the driver will keep two copies of the
              shadow framebuffer. When the  shadow  framebuffer  is  flushed,  the  old  and  new
              versions  of the shadow are compared, and only tiles that have actually changed are
              uploaded to the device. This is an optimization for server-class GPUs with a remote
              display  function  (typically  VNC),  where  remote  updates  are  triggered by any
              framebuffer write, so minimizing the amount of  data  uploaded  is  crucial.   This
              defaults to enabled for ASPEED and Matrox G200 devices, and disabled otherwise.

       Option "AccelMethod" "string"
              One of "glamor" or "none".  Default: glamor.

       Option "PageFlip" "boolean"
              Enable DRI3 page flipping.  The default is on.

       Option "ZaphodHeads" "string"
              Specify  the  RandR  output(s)  to  use  with  zaphod  mode for a particular driver
              instance.  If you use this option you must use this option for all instances of the
              driver.
              For  example: Option "ZaphodHeads" "LVDS,VGA-0" will assign xrandr outputs LVDS and
              VGA-0 to this instance of the driver.

       SEE ALSO
              Xorg(1), xorg.conf(5), Xserver(1), X(7)

AUTHORS

       Authors include: Dave Airlie