Provided by: xserver-xorg-driver-i810_126.96.36.199-0ubuntu6_i386
i810 - Intel 8xx integrated graphics chipsets
i810 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 830M 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.
i810 supports the i810, i810-DC100, i810e, i815, 830M, 845G, 852GM,
855GM, 865G, 915G and 915GM chipsets.
Please refer to xorg.conf(5x) 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
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, 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
insufficient video memory. Either of these being disabled will reduce
performance for 3D applications. Note however, that increasing this
value too much will reduce the amount of system memory available for
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
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.
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
performance 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
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
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
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
configure 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
configurations 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 configuration. 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
monitor at a different refresh rate than the primary. Default:
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
performance 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.
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
caution. 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
Option "Rotate" "CW"
Option "Rotate" "CCW"
Rotate the desktop 90 degrees clockwise or counterclockwise.
This option forces the ShadowFB option on, and disables
acceleration. Default: no rotation.
Option "ShadowFB" "boolean"
Enable or disable use of the shadow framebuffer layer. This
option disables acceleration. Default: off.
Xorg(1x), xorg.conf(5x), xorgconfig(1x), Xserver(1x), X(7)
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 and 915GM support added by Alan Hourihane and
Keith Whitwell. Dual Head, Clone and lid status support added by Alan