i810(7)
NAME
i810 - Intel 8xx integrated graphics chipsets
SYNOPSIS
Section "Device"
Identifier "devname"
Driver "i810"
...
EndSection
DESCRIPTION
i810 is an Xorg driver for Intel integrated graphics chipsets. The
driver supports depths 8, 15, 16 and 24. All visual types are sup-
ported in depth 8. For the i810/i815 other depths support the True-
Color and DirectColor visuals. For the 830M and later, only the True-
Color visual is supported for depths greater than 8. The driver sup-
ports 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.
SUPPORTED HARDWARE
i810 supports the i810, i810-DC100, i810e, i815, 830M, 845G, 852GM,
855GM, 865G and 915G chipsets.
CONFIGURATION DETAILS
Please refer to xorg.conf(4) 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 mem-
ory 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 graphics. 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 Xorg 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 insuffi-
cient video memory. Either of these being disabled will reduce perfor-
mance 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 per-
formance at the expense of 3D performance. Default: depends on
the resolution, depth, and available video memory. The driver
attempts to allocate 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 Xorg log file.
Option "DRI" "boolean"
Disable or enable DRI support. Default: DRI is enabled for con-
figurations 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 "VBERestore" "boolean"
Enable or disable the use of VBE save/restore for saving and
restoring the initial text mode. This is disabled 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 con-
figure a CRT on Pipe A and an LFP on Pipe B. Regardless of the
primary heads' pipe it is always configured as
"<PIPEA>,<PIPEB>". Additionally you can add different configu-
rations 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 configurations 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 configurations of monitor
types may fail, this depends on the Video BIOS and system con-
figuration. Default: Not configured, and will use the current
head's pipe and monitor.
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
this option. Default: Clone mode on pipe B is disabled.
Option "CloneRefresh" "integer"
When the Clone option is specified we can drive the second moni-
tor 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 perfor-
mance 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 cau-
tion. 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: disabled
SEE ALSO
Xorg(1), xorg.conf(4), xorgconfig(1), Xserver(1), X(5)
AUTHORS
Authors include: Keith Whitwell, and also Jonathan Bian, Matthew J Sot-
tek, 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 support added by Alan Hourihane and Keith
Whitwell. Dual Head, Clone and lid status support added by Alan Houri-
hane.
X.Org Version 6.8.2 I810(7)
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