The Intel 8xx and 9xx families of integrated graphics chipsets have 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, FreeBSD, OpenBSD, NetBSD, and Solaris have such kernel drivers available.
By default, the i810 will use 8 megabytes of system memory for graphics. For the 830M and later, the driver will automatically size its memory allocation according to the features it will support. 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 "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 when XAA acceleration is enabled. 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 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 "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.
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 chipsets:
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 "Legacy3D" "boolean"
Enable support for the legacy i915_dri.so 3D driver. This will, among other things, make the 2D driver tell libGL to load the 3D driver i915_dri.so instead of the newer i915tex_dri.so. 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.
Option "PageFlip" "boolean"
Enable support for page flipping. This should improve 3D performance at the potential cost of worse performance with mixed 2D/3D. Also note that this gives no benefit without corresponding support in the Mesa 3D driver and may not give the full benefit without triple buffering (see Option "TripleBuffer" ). Default for i810: The option is not used. Default for i830 and above: Disabled (This option is currently unstable).
Option "TripleBuffer" "boolean"
Enable support for triple buffering. This should improve 3D performance at the potential cost of worse performance with mixed 2D/3D. Also note that this gives no benefit without corresponding support in the Mesa 3D driver and may not give any benefit without page flipping either (see Option "PageFlip" ). Default for i810: The option is not used. Default for i830 and above: Disabled.
Option "AccelMethod" "string"
Choose acceleration architecture, either "XAA" or "EXA". XAA is the old (but stable) XFree86 based acceleration architecture. EXA is a newer and simpler acceleration architecture designed to better accelerate the X Render extension. Default: "XAA".
Option "ModeDebug" "boolean"
Enable printing of additional debugging information about modesetting to the server log.
The 830M and newer driver supports the following outputs through RandR 1.2:
TMDS-2 Second DVI SDVO output
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.
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