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

X Version 11                                   xorg-server 1.20.8                                 MODESETTING(4)