MirOS Manual: i810(4)


I810(4)             UNIX Programmer's Manual              I810(4)

NAME

     i810 - Intel 8xx integrated graphics chipsets

SYNOPSIS

     Section "Device"
       Identifier "devname"
       Driver "i810"
       ...
     EndSection

DESCRIPTION

     i810 is an XFree86 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 830M and later, only the TrueColor visual is sup-
     ported for depths greater than 8.  The driver supports
     hardware accelerated 3D via the Direct Rendering Infrastruc-
     ture (DRI), but only in depth 16 for the i810/i815 and
     depths 16 and 24 for the 830M and later.

SUPPORTED HARDWARE

     i810 supports the i810, i810-DC100, i810e, i815, 830M, 845G,
     852GM, 855GM, 865G, 915G and 915GM chipsets.

CONFIGURATION DETAILS

     Please refer to XF86Config(5) for general configuration
     details.  This section only covers configuration details
     specific to this driver.

     The Intel 8xx family of integrated graphics chipsets has a
     unified memory architecture and uses system memory for video
     ram.  For the i810 and i815 familiy 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 graph-
     ics.  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 chipets.  It is advisable to check the XFree86 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.

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     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 enabled.

     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 perfor-
          mance. Default: depends on the resolution, depth, and
          available video memory.  The driver attempts to allo-
          cate at least enough to hold two DVD-sized YUV buffers
          by default.  The default used for a specific configura-
          tion can be found by examining the XFree86 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 chipsets:

     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.

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     Option "XvMCSurfaces" "integer"
          This option enables XvMC.  The integer parameter speci-
          fies 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 chipsets:

     Option "VBERestore" "boolean"
          Enable or disable the use of VBE save/restore for sav-
          ing and restoring the initial text mode.  This is dis-
          abled 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 con-
          figured 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 confi-
          gurations 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 configura-
          tions of monitor types may fail, this depends on the
          Video BIOS and system configuration. Default: Not con-
          figured, and will use the current head's pipe and moni-
          tor.

     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

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I810(4)             UNIX Programmer's Manual              I810(4)

          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: 60Hz.

     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: dis-
          abled

SEE ALSO

     XFree86(1), XF86Config(5), xf86config(1), Xserver(1), X(7)

AUTHORS

     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 and 915GM support added by Alan Hourihane and Keith
     Whitwell. Dual Head, Clone and lid status support added by

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     Alan Hourihane.

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