path: root/man/intel.man

.\" shorthand for double quote that works everywhere.
.ds q \N'34'
.TH intel  __drivermansuffix__ __vendorversion__
.SH NAME
intel \- Intel integrated graphics chipsets
.SH SYNOPSIS
.nf
.B "Section \*qDevice\*q"
.BI "  Identifier \*q"  devname \*q
.B  "  Driver \*qintel\*q"
\ \ ...
.B EndSection
.fi
.SH DESCRIPTION
.B intel
is an __xservername__ 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.
.SH SUPPORTED HARDWARE
.B intel
supports the i810, i810-DC100, i810e, i815, i830M, 845G, 852GM, 855GM,
865G, 915G, 915GM, 945G, 945GM, 965G, 965Q, 946GZ, 965GM, 945GME,
G33, Q33, and Q35 chipsets.

.SH CONFIGURATION DETAILS
Please refer to __xconfigfile__(__filemansuffix__) for general configuration
details.  This section only covers configuration details specific to this
driver.
.PP
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.
.PP
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
.B VideoRam
option, which in the past had been necessary to allow more than some small
amount of memory to be allocated, is now ignored.
.PP
The following driver
.B Options
are supported
.TP
.BI "Option \*qNoAccel\*q \*q" boolean \*q
Disable or enable acceleration.  Default: acceleration is enabled.
.TP
.BI "Option \*qSWCursor\*q \*q" boolean \*q
Disable or enable software cursor.  Default: software cursor is disable
and a hardware cursor is used for configurations where the hardware cursor
is available.
.TP
.BI "Option \*qColorKey\*q \*q" integer \*q
This sets the default pixel value for the YUV video overlay key.
Default: undefined.
.TP
.BI "Option \*qCacheLines\*q \*q" integer \*q
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 __xservername__ log file.
.TP
.BI "Option \*qFramebufferCompression\*q \*q" boolean \*q
This option controls whether the framebuffer compression feature is enabled.
If possible, the front buffer will be allocated in a tiled format and compressed
periodically to save memory bandwidth and power.
This option is only available on mobile chipsets.
Default: enabled on supported configurations.
.TP
.BI "Option \*qTiling\*q \*q" boolean \*q
This option controls whether memory buffers are allocated in tiled mode.  In
many cases (especially for complex rendering), tiling can improve performance.
Default: enabled.
.TP
.BI "Option \*qDRI\*q \*q" boolean \*q
Disable or enable DRI support.
Default: DRI is enabled for configurations where it is supported.

.PP
The following driver
.B Options
are supported for the i810 and i815 chipsets:
.TP
.BI "Option \*qDDC\*q \*q" boolean \*q
Disable or enable DDC support.
Default: enabled.
.TP
.BI "Option \*qDac6Bit\*q \*q" boolean \*q
Enable or disable 6-bits per RGB for 8-bit modes.
Default: 8-bits per RGB for 8-bit modes.
.TP
.BI "Option \*qXvMCSurfaces\*q \*q" integer \*q
This option enables XvMC.  The integer parameter specifies the number of
surfaces to use.  Valid values are 6 and 7.
Default: XvMC is disabled.

.PP
The following driver
.B Options
are supported for the 830M and later chipsets:
.TP
.BI "Option \*qVideoKey\*q \*q" integer \*q
This is the same as the
.B \*qColorKey\*q
option described above.  It is provided for compatibility with most
other drivers.
.TP
.BI "Option \*qXVideo\*q \*q" boolean \*q
Disable or enable XVideo support.
Default: XVideo is enabled for configurations where it is supported.
.TP
.BI "Option \*qLegacy3D\*q \*q" boolean \*q
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.
Default for i810: The option is not used.
Default for i965: The option is always true.
.TP
.BI "Option \*qAperTexSize\*q \*q" integer \*q
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
activate the legacy texture pool (see 
.B "Option \*qLegacy3D\*q"
). If you run 3D programs with large texture memory requirements, you might
gain some performance by increasing this value.
Default: 32768.
.TP
.BI "Option \*qPageFlip\*q \*q" boolean \*q
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
.B "Option \*qTripleBuffer\*q"
).
Default for i810: The option is not used.
Default for i830 and above: Disabled (This option is currently unstable).
.TP
.BI "Option \*qTripleBuffer\*q \*q" boolean \*q
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
.B "Option \*qPageFlip\*q"
).
Default for i810: The option is not used.
Default for i830 and above: Disabled.
.TP
.BI "Option \*qAccelMethod\*q \*q" string \*q
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".
.TP
.BI "Option \*qModeDebug\*q \*q" boolean \*q
Enable printing of additional debugging information about modesetting to
the server log.

.PP
The 830M and newer driver supports the following outputs through RandR 1.2:
.PP
.TP
.BI "VGA"
Analog VGA output
.TP
.BI "LVDS"
Laptop panel
.TP
.BI "TV"
Integrated TV output
.TP
.BI "TMDS-1"
First DVI SDVO output
.TP
.BI "TMDS-2"
Second DVI SDVO output
.PP
SDVO and DVO TV outputs are not supported by the driver at this time.
.PP
See __xconfigfile__(__filemansuffix__) for information on associating Monitor
sections with these outputs for configuration.

.SH "SEE ALSO"
__xservername__(__appmansuffix__), __xconfigfile__(__filemansuffix__), xorgconfig(__appmansuffix__), Xserver(__appmansuffix__), X(__miscmansuffix__)
.SH 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,
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.