Section: Devices and Network Interfaces (4)
Updated: xf86-video-intel 2.21.15
Section "Device" Identifier "devname" Driver "intel" ... EndSection
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 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.
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.
Please refer to (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 support. Therefore, 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
The following driver Options are supported for the i810 and i815 chipsets:
The following driver Options are supported for the 830M and later chipsets:
For example: Option "ZaphodHeads" "LVDS1,VGA1" will assign xrandr outputs LVDS1 and VGA0 to this instance of the driver.:
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:
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 output port (typically exposed via an HD15 connector).
Low Voltage Differential Signalling output (typically a laptop LCD panel). Available properties:
:BACKLIGHT - current backlight level (adjustable) <DD CLASS="c2|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).:
The precise names of these options may differ depending on the kernel video driver, (but the functionality should be similar). See the output of xrandr --prop for a list of currently available scaling modes.
Integrated TV output. Available properties include:
First DVI SDVO output
Second DVI SDVO output
DVI/HDMI outputs. Avaliable common properties include:
SDVO and DVO TV outputs are not supported by the driver at this time.
See (5) for information on associating Monitor sections with these outputs for configuration. Associating Monitor sections with each output can be helpful if you need to ignore a specific output, for example, or statically configure an extended desktop monitor layout.
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 desktop 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 statically 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
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 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).
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 experiences and ask questions about configuration and other topics. See lists.freedesktop.org for more information (the email@example.com mailing list is the most appropriate place to ask X.Org and driver related questions).
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.
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