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       intel - Intel integrated graphics chipsets


       Section "Device"
         Identifier "devname"
         Driver "intel"


       intel  is  an  Xorg driver for Intel integrated graphics chipsets.  The
       driver supports depths  8,  15,  16  and  24.   All  visual  types  are
       supported  in  depth  8.   For  the  i810/i815 other depths support the
       TrueColor and DirectColor visuals.  For the i830M and later,  only  the
       TrueColor  visual  is  supported for depths greater than 8.  The driver
       supports   hardware   accelerated   3D   via   the   Direct   Rendering
       Infrastructure (DRI), but only in depth 16 for the i810/i815 and depths
       16 and 24 for the 830M and later.


       intel supports the i810, i810-DC100, i810e, i815, i830M,  845G,  852GM,
       855GM,  865G,  915G,  915GM,  945G,  945GM,  965G,  965Q, 946GZ, 965GM,
       945GME, G33, Q33, Q35, G35, GM45, G45,  Q45,  G43,  G41  chipsets,  and
       Pineview-M in Atom N400 series, Pineview-D in Atom D400/D500 series.


       Please  refer  to xorg.conf(5) for general configuration details.  This
       section only covers configuration details specific to this driver.

       The Intel 8xx and 9xx families of integrated graphics chipsets  have  a
       unified memory architecture meaning that system memory is used as video
       RAM.  For the i810  and  i815  family  of  chipsets,  operating  system
       support  for  allocating system memory is required in order to use this
       driver.  For the 830M and later, this is  required  in  order  for  the
       driver  to  use more video RAM than has been pre-allocated at boot time
       by the BIOS.  This is usually  achieved  with  an  "agpgart"  or  "agp"
       kernel  driver.  Linux, FreeBSD, OpenBSD, NetBSD, and Solaris have such
       kernel drivers available.

       By default, the i810/i815 will use 8 MB of system memory  for  graphics
       if  AGP  allocable  memory  is  < 128 MB, 16 MB if < 192 MB or 24 MB if
       higher. Use the VideoRam option to change the default value.

       For the 830M and later, the driver will automatically size  its  memory
       allocation  according  to the features it will support.  Therefore, the
       VideoRam option, which in the past had been  necessary  to  allow  more
       than some small amount of memory to be allocated, is now ignored.

       The following driver Options are supported

       Option "ColorKey" "integer"
              This sets the default pixel value for the YUV video overlay key.

              Default: undefined.

       Option "DRI" "boolean"
              Disable or enable DRI support.

              Default:  DRI  is  enabled  for  configurations  where   it   is

       The  following  driver  Options  are  supported  for  the i810 and i815

       Option "CacheLines" "integer"
              This allows the user to change the  amount  of  graphics  memory
              used  for  2D  acceleration  and  video when XAA acceleration is
              enabled.  Decreasing this amount leaves more  for  3D  textures.
              Increasing  it  can  improve 2D performance at the expense of 3D

              Default: depends on the resolution, depth, and  available  video
              memory.   The  driver  attempts  to  allocate  space  for  at  3
              screenfuls of pixmaps plus an HD-sized XV  video.   The  default
              used  for a specific configuration can be found by examining the
              Xorg log file.

       Option "DDC" "boolean"
              Disable or enable DDC support.

              Default: enabled.

       Option "Dac6Bit" "boolean"
              Enable or disable 6-bits per RGB for 8-bit modes.

              Default: 8-bits per RGB for 8-bit modes.

       Option "XvMCSurfaces" "integer"
              This option enables XvMC.  The integer parameter  specifies  the
              number of surfaces to use.  Valid values are 6 and 7.

              Default: XvMC is disabled.

       VideoRam integer
              This  option  specifies  the  amount of system memory to use for
              graphics, in KB.

              The default is 8192 if AGP allocable memory is < 128  MB,  16384
              if  <  192  MB, 24576 if higher. DRI require at least a value of
              16384. Higher values may give better 3D performance, at  expense
              of available system memory.

       Option "NoAccel" "boolean"
              Disable or enable acceleration.

              Default: acceleration is enabled.

       The  following  driver  Options  are  supported  for the 830M and later

       Option "VideoKey" "integer"
              This is the same as the "ColorKey" option described  above.   It
              is provided for compatibility with most other drivers.

       Option "XvPreferOverlay" "boolean"
              Make  hardware  overlay  be  the  first XV adaptor.  The overlay
              behaves incorrectly in the presence  of  compositing,  but  some
              prefer  it  due  to  it  syncing  to  vblank  in  the absence of
              compositing.  While most XV-using applications have  options  to
              select which XV adaptor to use, this option can be used to place
              the overlay first for applications which don't have options  for
              selecting adaptors.

              Default: Textured video adaptor is preferred.

       Option "FallbackDebug" "boolean"
              Enable   printing   of  debugging  information  on  acceleration
              fallbacks to the server log.

              Default: Disabled

       Option "DebugFlushBatches" "boolean"
              Flush the batch buffer after every single operation.

              Default: Disabled

       Option "DebugFlushCaches" "boolean"
              Include an MI_FLUSH at the end of every batch  buffer  to  force
              data  to  be  flushed  out  of  cache and into memory before the
              completion of the batch.

              Default: Disabled

       Option "DebugWait" "boolean"
              Wait for the completion of every batch buffer before continuing,
              i.e. perform synchronous rendering.

              Default: Disabled

       Option "SwapbuffersWait" "boolean"
              This   option   controls  the  behavior  of  glXSwapBuffers  and
              glXCopySubBufferMESA calls by GL applications.  If enabled,  the
              calls  will avoid tearing by making sure the display scanline is
              outside of the area to be copied before  the  copy  occurs.   If
              disabled,  no  scanline  synchronization  is  performed, meaning
              tearing will likely occur.  Note that when enabled, this  option
              can  adversely  affect the framerate of applications that render
              frames at less than refresh rate.

              Default: enabled.

       Option "Tiling" "boolean"
              This option controls whether memory  buffers  are  allocated  in
              tiled  mode.   In most cases (especially for complex rendering),
              tiling dramatically improves performance.

              Default: enabled.

       Option "XvMC" "boolean"
              Enable XvMC driver. Current support MPEG2 MC on 915/945 and  G33
              series.  User should provide absolute path to in
              XvMCConfig file.

              Default: Disabled.


       On 830M and better chipsets, the driver supports runtime  configuration
       of detected outputs.  You can use the xrandr tool to control outputs on
       the command line as follows:

              xrandr --output output --set property value

       Note that you may need to  quote  property  and  value  arguments  that
       contain  spaces.   Each  output  listed  below  may  have  one  or more
       properties associated with it (like a  binary  EDID  block  if  one  is
       found).  Some outputs have unique properties which are described below.
       See  the  "MULTIHEAD  CONFIGURATIONS"  section  below  for   additional

       VGA output port (typically exposed via an HD15 connector).

       Low  Voltage  Differential  Signalling  output  (typically a laptop LCD
       panel).  Available properties:

       BACKLIGHT - current backlight level (adjustable)

       By adjusting the BACKLIGHT property, the brightness on the LVDS  output
       can  be adjusted.  In some cases, this property may be unavailable (for
       example if your platform uses an external  microcontroller  to  control
       the backlight).

       scaling mode - control LCD panel scaling mode

       When the currently selected display mode differs from the native  panel
       resolution, various scaling options are available. These include


         Simply center the image on-screen without scaling. This is  the  only
         scaling  mode  that  guarantees  a  one-to-one correspondence between
         native and displayed pixels, but some portions of the  panel  may  be
         unused (so-called "letterboxing").

         Full aspect

         Scale the image as much as possible while  preserving  aspect  ratio.
         Pixels   may   not   be  displayed  one-to-one  (there  may  be  some
         blurriness). Some portions of the panel may be unused if  the  aspect
         ratio of the selected mode does not match that of the panel.


         Scale the image to the panel size without  regard  to  aspect  ratio.
         This  is the only mode which guarantees that every pixel of the panel
         will be used. But the displayed image may be distorted by  stretching
         either  horizontally  or  vertically, and pixels may not be displayed
         one-to-one (there may be some blurriness).

       The precise names of these options may differ depending on  the  kernel
       video driver, (but the functionality should be similar). See the output
       of xrandr --prop for a list of currently available scaling modes.

       Integrated TV output.  Available properties include:

       BOTTOM, RIGHT, TOP, LEFT - margins

       Adjusting these properties allows you to control the placement of  your
       TV output buffer on the screen. The options with the same name can also
       be set in xorg.conf with integer value.

       BRIGHTNESS - TV brightness, range 0-255

       Adjust TV brightness, default value is 128.

       CONTRAST - TV contrast, range 0-255

       Adjust TV contrast, default value is 1.0 in chipset specific format.

       SATURATION - TV saturation, range 0-255

       Adjust TV saturation, default value is 1.0 in chipset specific  format.

       HUE - TV hue, range 0-255

       Adjust TV hue, default value is 0.

       TV_FORMAT - output standard

       This property allows you to control the output standard used on your TV
       output  port.   You can select between NTSC-M, NTSC-443, NTSC-J, PAL-M,
       PAL-N, and PAL.

       TV_Connector - connector type

       This config option should be added to xorg.conf TV  monitor's  section,
       it  allows you to force the TV output connector type, which bypass load
       detect and TV will always be taken as connected. You can select between
       S-Video, Composite and Component.

       First DVI SDVO output

       Second DVI SDVO output

   TMDS-1 , TMDS-2 , HDMI-1 , HDMI-2
       DVI/HDMI outputs. Avaliable common properties include:

       BROADCAST_RGB - method used to set RGB color  range(full  range  0-255,
       not full range 16-235)

       Adjusting  this  propertie  allows  you  to set RGB color range on each
       channel in order to match HDTV requirment(default 0  for  full  range).
       Setting  1  means RGB color range is 16-235, 0 means RGB color range is
       0-255 on each channel.

       SDVO and DVO TV outputs are not supported by the driver at this time.

       See  xorg.conf(5)  for information on associating Monitor sections with
       these outputs for configuration.   Associating  Monitor  sections  with
       each output can be helpful if you need to ignore a specific output, for
       example, or statically configure an extended desktop monitor layout.


       The number of independent outputs is dictated by the  number  of  CRTCs
       (in  X  parlance)  a given chip supports.  Most recent Intel chips have
       two CRTCs, meaning that two  separate  framebuffers  can  be  displayed
       simultaneously,  in  an  extended  desktop  configuration.   If  a chip
       supports more outputs than it has CRTCs (say local flat panel, VGA  and
       TV  in  the  case  of many outputs), two of the outputs will have to be
       "cloned", meaning that they display the same framebuffer  contents  (or
       one  displays  a  subset  of  another's framebuffer if the modes aren't

       You can use the "xrandr" tool, or various desktop utilities, to  change
       your  output  configuration  at  runtime.  To statically configure your
       outputs, you can use the "Monitor-<type>" options along with additional
       monitor sections in your xorg.conf to create your screen topology.  The
       example below puts the VGA output to the right of  the  builtin  laptop
       screen, both running at 1024x768.

       Section "Monitor"
         Identifier "Laptop FooBar Internal Display"
         Option "Position" "0 0"

       Section "Monitor"
         Identifier "Some Random CRT"
         Option "Position" "1024 0"
         Option "RightOf" "Laptop FoodBar Internal Display"

       Section "Device"
         Driver "intel"
         Option "monitor-LVDS" "Laptop FooBar Internal Display"
         Option "monitor-VGA" "Some Random CRT"


       The driver supports the following X11 Xv attributes for Textured Video.
       You can use the "xvattr" tool to query/set those attributes at runtime.

       XV_SYNC_TO_VBLANK   is   used   to  control  whether  textured  adapter
       synchronizes the screen update to the vblank to eliminate  tearing.  It
       is  a  Boolean  attribute  with  values  of 0 (never sync) or 1 (always
       sync). An historic value of -1 (sync for large windows only)  will  now
       be interpreted as 1, (since the current approach for sync is not costly
       even with small video windows).



       The xf86-video-intel driver is part of the  X.Org  and
       umbrella   projects.    Details  on  bug  reporting  can  be  found  at       Mailing
       lists  are  also  commonly used to report experiences and ask questions
       about configuration and other topics.   See  for
       more  information  (the mailing list is the
       most appropriate place to ask X.Org and driver related questions).


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


       Authors include: Keith Whitwell, and  also  Jonathan  Bian,  Matthew  J
       Sottek,  Jeff Hartmann, Mark Vojkovich, Alan Hourihane, H. J. Lu.  830M
       and 845G support reworked for XFree86 4.3  by  David  Dawes  and  Keith
       Whitwell.   852GM,  855GM,  and  865G  support added by David Dawes and
       Keith Whitwell.  915G, 915GM, 945G, 945GM, 965G, 965Q and 946GZ support
       added by Alan Hourihane and Keith Whitwell. Lid status support added by
       Alan Hourihane. Textured video support for 915G and later chips,  RandR
       1.2  and  hardware  modesetting added by Eric Anholt and Keith Packard.
       EXA and Render acceleration added by Wang Zhenyu. TV out support  added
       by  Zou  Nan  Hai  and  Keith Packard. 965GM, G33, Q33, and Q35 support
       added by Wang Zhenyu.