Provided by: xserver-xorg-video-i810_1.7.4-0ubuntu7_i386 bug


       i810 - Intel 8xx integrated graphics chipsets


       Section "Device"
         Identifier "devname"
         Driver "i810"


       i810  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.


       i810 supports the i810, i810-DC100, i810e, i815,  i830M,  845G,  852GM,
       855GM, 865G, 915G, 915GM, 945G, 945GM, 965G, 965Q and 946GZ chipsets.


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

       The Intel 8xx and 9xx families of integrated graphics  chipsets  has  a
       unified  memory architecture and uses system memory for video ram.  For
       the i810 and i815 family  of  chipset,  operating  system  support  for
       allocating system memory for video use 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,  and  recent  versions of FreeBSD, OpenBSD and
       NetBSD have such kernel drivers available.

       By default 8 Megabytes of system memory are used for graphics.  For the
       830M  and later, the default is 8 Megabytes when DRI is not enabled and
       32 Megabytes with DRI is enabled.  This amount may be changed with  the
       VideoRam entry in the config file Device section.  It may be set to any
       reasonable value up to 64MB for  older  chipsets  or  128MB  for  newer
       chipsets.   It  is advisable to check the Xorg log file to check if any
       features have been disabled because of insufficient video  memory.   In
       particular,   DRI   support   or  tiling  mode  may  be  disabled  with
       insufficient video memory.  Either of these being disabled will  reduce
       performance  for  3D  applications.  Note however, that increasing this
       value too much will reduce the amount of system  memory  available  for
       other applications.

       The  driver  makes use of the video BIOS to program video modes for the
       830M and later.  This limits the video modes that can be used to  those
       provided  by the video BIOS, and to those that will fit into the amount
       of video memory that the video BIOS is aware of.

       The following driver Options are supported

       Option "NoAccel" "boolean"
              Disable  or  enable  acceleration.   Default:  acceleration   is

       Option "SWCursor" "boolean"
              Disable  or enable software cursor.  Default: software cursor is
              disable and a hardware cursor is used for  configurations  where
              the hardware cursor is available.

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

       Option "CacheLines" "integer"
              This allows the user to change the  amount  of  graphics  memory
              used  for  2D  acceleration  and  video.  Decreasing this amount
              leaves more for 3D  textures.   Increasing  it  can  improve  2D
              performance  at the expense of 3D performance.  Default: depends
              on the resolution,  depth,  and  available  video  memory.   The
              driver  attempts  to  allocate  at least enough to hold two DVD-
              sized YUV buffers by default.  The default used for  a  specific
              configuration can be found by examining the Xorg log file.

       Option "DRI" "boolean"
              Disable  or  enable  DRI  support.   Default: DRI is enabled for
              configurations where it is supported.

       The following driver Options  are  supported  for  the  i810  and  i815

       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.

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

       Option "VBERestore" "boolean"
              Enable  or  disable  the  use of VBE save/restore for saving and
              restoring the initial text mode.  This is  disabled  by  default
              because it causes lockups on some platforms.  However, there are
              some cases where it must enabled for the correct restoration  of
              the  initial video mode.  If you are having a problem with that,
              try enabling this option.  Default: Disabled.

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

       Option "XVideo" "boolean"
              Disable  or  enable  XVideo support.  Default: XVideo is enabled
              for configurations where it is supported.

       Option "MonitorLayout" "anystr"
              Allow different  monitor  configurations.  e.g.  "CRT,LFP"  will
              configure  a  CRT  on Pipe A and an LFP on Pipe B. Regardless of
              the  primary  heads’   pipe   it   is   always   configured   as
              "<PIPEA>,<PIPEB>".    Additionally   you   can   add   different
              configurations such as "CRT+DFP,LFP" which would put  a  digital
              flat  panel  and a CRT on pipe A, and a local flat panel on pipe
              B.  For single pipe configurations  you  can  just  specify  the
              monitors  types  on  Pipe A, such as "CRT+DFP" which will enable
              the CRT and DFP on Pipe A.  Valid monitors are  CRT,  LFP,  DFP,
              TV,  CRT2,  LFP2, DFP2, TV2 and NONE.  NOTE: Some configurations
              of monitor types may fail, this depends on the  Video  BIOS  and
              system configuration.  Default: Not configured, and will use the
              current head’s pipe and monitor.

       Option "Clone" "boolean"
              Enable Clone mode on pipe B. This will setup the second head  as
              a  complete  mirror  of  the  monitor attached to pipe A.  NOTE:
              Video overlay functions will not work on the second head in this
              mode.  If you require this, then use the MonitorLayout above and
              do (as an example) "CRT+DFP,NONE" to configure both  a  CRT  and
              DFP  on Pipe A to achieve local mirroring and disable the use of
              this option.  Default: Clone mode on pipe B is disabled.

       Option "CloneRefresh" "integer"
              When the Clone option is  specified  we  can  drive  the  second
              monitor  at a different refresh rate than the primary.  Default:

       Option "CheckLid" "boolean"
              On mobile platforms it’s desirable to monitor the lid status and
              switch the outputs accordingly when the lid is opened or closed.
              By default this option  is  on,  but  may  incur  a  very  minor
              performance penalty as we need to poll a register on the card to
              check for this activity. It can be turned off using this option.
              This  only  works  with  the  830M,  852GM  and  855GM  systems.
              Default: enabled.

       Option "FlipPrimary" "boolean"
              When using a dual pipe system, it may be  preferable  to  switch
              the primary screen to the alternate pipe to display on the other
              monitor connection.  NOTE: Using this option may cause text mode
              to  be  restored  incorrectly,  and  thus  should  be  used with
              caution.  Default: disabled.

       Option "DisplayInfo" "boolean"
              It has been found that  a  certain  BIOS  call  can  lockup  the
              Xserver  because  of  a  problem in the Video BIOS. The log file
              will identify if you are suffering from this  problem  and  tell
              you to turn this option off.  Default: enabled

       Option "DevicePresence" "boolean"
              Tell  the  driver  to  perform an active detect of the currently
              connected monitors. This option is useful if the monitor was not
              connected  when  the  machine  has  booted, but unfortunately it
              doesn’t always work and is extremely dependent  upon  the  Video
              BIOS.  Default: disabled

       Option "Rotate" "90"
              Rotate  the  desktop  90  degrees  counterclockwise. Other valid
              options are 0, 90, 180 and 270 degrees. The RandR  extension  is
              used  for  rotation  functionality.  So  this  option allows the
              Xserver to start with a rotated mode of operation.   Default:  0

       Option "LinearAlloc" "integer"
              Allows  more  memory  for  the offscreen allocator. This usually
              helps in situations where HDTV movies are required to  play  but
              not  enough  offscreen  memory is usually available. Set this to
              8160 for upto 1920x1080 HDTV support.  Default 0KB (off).

       Option "Legacy3D" "boolean"
              Enable support for the legacy 3D driver.  This will,
              among other things, make the 2D driver tell libGL to load the 3D
              driver instead of the  newer   This
              option  is  only  used  for  chipsets  in  the  range i830-i945.
              Default for i830-i945 series: Enabled for i915  drm  versions  <
              1.7.0.  Otherwise disabled.  Default for i810: The option is not
              used.  Default for i965: The option is always true.

       Option "AperTexSize" "integer"
              Give the size in kiB of the AGP aperture area that  is  reserved
              for  the  DRM  memory  manager  present in i915 drm from version
              1.7.0 and upwards, and that is used with the 3D driver  in  Mesa
              from  version  6.5.2 and upwards. If the size is set too high to
              make room for pre-allocated VideoRam, the  driver  will  try  to
              reduce  it  automatically.  If  you  use  only older Mesa or DRM
              versions, you may set this value  to  zero,  and  atctivate  the
              legacy  texture  pool  (see  Option  "Legacy3D" ). If you run 3D
              programs with large texture memory requirements, you might  gain
              some performance by increasing this value.  Default: 32768.


       Xorg(1x), xorg.conf(5x), xorgconfig(1x), Xserver(1x), 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.  Dual Head, Clone  and  lid
       status support added by Alan Hourihane. Textured video support for 915G
       and later chips added by Keith Packard and Eric Anholt.