Information for Intel graphics driver users <author>Eric Anholt <date>2006-04-02 <toc> <sect>Introduction This document provides a brief summary of the Intel graphics support provided by the xf86-video-intel driver. More information can also be found in the <htmlurl name="intel(4)" url="intel.4.html"> manual page. <sect>Supported Hardware <itemize> <item>i810, <item>i810-dc100, <item>i810e <item>i815 <item>i830 <item>i845 <item>i852 <item>i855 <item>i915 <item>i945 <item>i965 </itemize> <sect>Features <itemize> <item>Full support for 8, 15, 16, and 24 bit pixel depths. <item>Hardware accelerated 2D drawing engine support for 8, 15, 16 and 24 bit pixel depths. <item>Hardware accelerated 3D drawing using OpenGL and the DRI. <item>Hardware cursor support to reduce sprite flicker. <item>Textured video XV implementation on i915 through i965. <item>Hardware overlay XV implementation up through i945. <item>Screen resize and rotation. </itemize> <sect>Technical Notes <itemize> <item>Interlace modes cannot be supported. <item>This driver requires kernel support for AGP, which is included in Linux kernels 2.3.42 and higher, and FreeBSD 4.1 and higher. <item>This driver may be built against xserver 1.2.0 or newer. If built from git source against an older server, a copy of xserver 1.3.0 source is needed to complete the build, which is chosen with the --with-xserver-source argument to ./configure. The compatibility mode with xserver 1.2.0 will have limited functionality, in particular by not supporting RandR 1.2 or the new Damage 1.1 updated needed for 3D applications to work with display rotation. </itemize> <sect>Configuration The driver auto-detects all device information necessary to initialize the card. The only lines you should need in the "Device" section of your xorg.conf file are: <verb> Section "Device" Identifier "intel" Driver "intel" EndSection </verb> <sect>Driver Options Please refer to the <htmlurl name="intel(4)" url="intel.4.html"> manual page for information on configuration options. <sect>Known Limitations <itemize> <item>Bug #8534: i830 laptop panels not supported. The driver will fail to recognize them, and only function through VGA output. Two partial DVO chip drivers (ivch and ch7017) are included which contain some of the code necessary for i830 laptop panel support, but some I2C debugging will be necessary to get those drivers to attach. <item>No support for "zaphod mode" dualhead. This is the mode in which two Device sections are placed in the config file, and doesn't support DRI or many other features. Instead, only "MergedFB-style" dualhead is supported. <item>No support for X Screens larger than 2048 pixels in either direction before the 965. This reflects hardware limitations in the x direction on those older chips, and limits dualhead functionality. It may be possible to extend the limit vertically on these older chips. <item>i855 XV may cause hangs. This was present in the previous release, and no workaround is known. <item>SDVO TV-out cards not supported. This should be fixed in the next release. <item>Gray output with integrated TV-out. <item>EXA support unstable on i845. </itemize> <sect>Common issues not caused by the driver <itemize> <item>Font sizes (DPI) are wrong. Some displays incorrectly report their physical size, which is harmless on most OSes that always assume 96dpi displays. This can be fixed through quirks for specific monitors in the X Server, and the output of xrandr --prop along with a physical measurement of the screen size in a bug report against the server can help get that fixed. <item>gnome-panel is located in the middle of the screen. gnome-panel places itself within head #0's boundaries, which doesn't work well with a second head covering the same area as head #0 but larger. <item>Older resolution-changing applicationss have poor results in multihead systems. Previous extensions such as RandR 1.1 exposed only a single output to client programs, and those requests map poorly to multi-head systems. Currently, those requests map to just one of the outputs in the RandR 1.2 environment, and those applications need to be updated to RandR 1.2 API when available for better results. <item> </itemize> <sect>Author <itemize> <item>Eric Anholt <item>Keith Whitwell </itemize> The X11R&relvers; version of this driver originally came from XFree86 4.4 rc2. The XFree86 version of this driver was donated to The XFree86 Project by: <verb> Precision Insight, Inc. Cedar Park, TX USA </verb> The X.Org version of this driver is maintained by Intel Corporation. <htmlurl name="http://www.intellinuxgraphics.org" url="http://www.intellinuxgraphics.org"> </article>