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intel(4) intel(4)
NAME
intel - Intel integrated graphics chipsets
SYNOPSIS
Section "Device"
Identifier "devname"
Driver "intel"
...
EndSection
DESCRIPTION
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 acceler-
ated 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.
SUPPORTED HARDWARE
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.
CONFIGURATION DETAILS
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 sup-
port. Therefore, the VideoRam option, which in the past had been necessary to allow more than some small amount of mem-
ory 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 supported.
The following driver Options are supported for the i810 and i815 chipsets:
Option "CacheLines" "integer"
This allows the user to change the amount of graphics memory used for 2D acceleration and video when XAA accelera-
tion 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 "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 chipsets:
Option "VideoKey" "integer"
This is the same as the "ColorKey" option described above. It is provided for compatibility with most other driv-
ers.
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 applica-
tions 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 lib-
IntelXvMC.so in XvMCConfig file.
Default: Disabled.
OUTPUT CONFIGURATION
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 information.
VGA
VGA output port (typically exposed via an HD15 connector).
LVDS
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
Center
Simply center the image on-screen without scaling. This is the only scaling mode that guarantees a one-to-one corre-
spondence 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.
Full
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 verti-
cally, 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 sim-
ilar). See the output of xrandr --prop for a list of currently available scaling modes.
TV
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.
TMDS-1
First DVI SDVO output
TMDS-2
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 Moni-
tor sections with each output can be helpful if you need to ignore a specific output, for example, or statically config-
ure an extended desktop monitor layout.
MULTIHEAD CONFIGURATIONS
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 desk-
top 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 equal).
You can use the "xrandr" tool, or various desktop utilities, to change your output configuration at runtime. To stati-
cally 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"
EndSection
Section "Monitor"
Identifier "Some Random CRT"
Option "Position" "1024 0"
Option "RightOf" "Laptop FoodBar Internal Display"
EndSection
Section "Device"
Driver "intel"
Option "monitor-LVDS" "Laptop FooBar Internal Display"
Option "monitor-VGA" "Some Random CRT"
EndSection
TEXTURED VIDEO ATTRIBUTES
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
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).
XV_BRIGHTNESS
XV_CONTRAST
REPORTING BUGS
The xf86-video-intel driver is part of the X.Org and Freedesktop.org umbrella projects. Details on bug reporting can be
found at http://www.intellinuxgraphics.org/how_to_report_bug.html. Mailing lists are also commonly used to report expe-
riences and ask questions about configuration and other topics. See lists.freedesktop.org for more information (the
xorgATlists.org mailing list is the most appropriate place to ask X.Org and driver related questions).
SEE ALSO
Xorg(1), xorg.conf(5), 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 sup-
port 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.
X Version 11 xf86-video-intel 2.12.0 intel(4)
