Overview

The Direct Rendering Infrastructure DRI allows direct access to the graphics hardware under the X windows system allowing fast OpenGL graphics.

Many popular graphics chipsets from ATI (r128, r200, r300) and Intel (i810 and i915) are well supported by the DRI Project.

ATI and Nvidia do provide binary only proprietory drivers which offer better performance and features when compared to the Open Source drivers.

Do check up the supported chipset matrix on the Project website before choosing a graphics card.

See http://dri.freedesktop.org/wiki/

Operating System Configuration

Linux

See Linux_DRI section.

FreeBSD

See FreeBSD_DRI Section

X Windows

xorg.conf

r300

Section "Monitor"
 ### Comment all HorizSync and VertSync values to use DDC:
       Identifier   "Monitor0"
       VendorName   "Monitor Vendor"
       ModelName    "LCD Panel 1024x768"
### Comment all HorizSync and VertSync values to use DDC:
       HorizSync    31.5 - 48.5
       VertRefresh  40.0 - 70.0
       Option      "dpms"
EndSection

Section "Device"
       Identifier  "Videocard0"
       Driver      "ati"
       VendorName  "Videocard vendor"
       BoardName   "ATI Technologies Inc RV350 [Mobility Radeon 9600 M10]"
       Option      "AGPMode" "2"
EndSection

Section "Screen"
       Identifier "Screen0"
       Device     "Videocard0"
       Monitor    "Monitor0"
       DefaultDepth     24
       SubSection "Display"
               Viewport   0 0
               Depth     16
               Modes    "800x600" "640x480"
       EndSubSection
       SubSection "Display"
               Viewport   0 0
               Depth     24
               Modes    "1024x768" "800x600" "640x480"
       EndSubSection
EndSection

Section "DRI"
       Group        0
       Mode         0666
EndSection

i915

Section "Module"
       Load  "extmod"
       Load  "glx"
       Load  "dri"
       Load  "dbe"
       Load  "record"
       Load  "xtrap"
       Load  "type1"
       Load  "freetype"
       Load  "vnc"
EndSection

Section "Extensions"
   Option "Composite"      "Enable"
   Option "RENDER"         "Enable"
   Option "XINERAMA"       "Disable"
EndSection

Section "Device"
       ### Available Driver options are:-
       ### Values: : integer, <f>: float, <bool>: "True"/"False",
       ### <string>: "String", <freq>: "<f> Hz/kHz/MHz"
       ### [arg]: arg optional
       #Option     "NoAccel"                   # [<bool>]
       #Option     "SWcursor"                  # [<bool>]
       #Option     "ColorKey"                  # <i>
       #Option     "CacheLines"                # <i>
       #Option     "Dac6Bit"                   # [<bool>]
       #Option     "DRI"                       # [<bool>]
       #Option     "NoDDC"                     # [<bool>]
       #Option     "ShowCache"                 # [<bool>]
       #Option     "XvMCSurfaces"              # <i>
       #Option     "PageFlip"                  # [<bool>]
       Identifier  "Card0"
       Driver      "i810"
       VendorName  "Intel Corp."
       BoardName   "82845G/GL [Brookdale-G] Chipset Integrated Graphics Device"
       BusID       "PCI:0:2:0"
EndSection

Section "Screen"
       DefaultColorDepth 24
       Identifier "Screen0"
       Device     "Card0"
       Monitor    "Monitor0"
       SubSection "Display"
               Viewport   0 0
               Depth     24
       Modes   "1280x1024"
       EndSubSection
EndSection

Section "DRI"
       Mode 0666
EndSection

(II) LoadModule: "dri"
(II) Module dri: vendor="X.Org Foundation"
(II) Loading sub module "drm"
(II) LoadModule: "drm"
(II) Module drm: vendor="X.Org Foundation"
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: node name is /dev/dri/card0
(II) I810(0): [drm] loaded kernel module for "i915" driver
(II) I810(0): [drm] DRM interface version 1.2
(II) I810(0): [drm] created "i915" driver at busid "pci:0000:00:02.0"
(II) I810(0): [drm] added 8192 byte SAREA at 0xa9750000
(II) I810(0): [drm] mapped SAREA 0xa9750000 to 0x2889a000
(II) I810(0): [drm] framebuffer handle = 0xe0020000
(II) I810(0): [drm] added 1 reserved context for kernel
(II) I810(0): [drm] Registers = 0xcfd00000
(II) I810(0): [drm] Back Buffer = 0xef000000
(II) I810(0): [drm] Depth Buffer = 0xee800000
(II) I810(0): [drm] ring buffer = 0xe0000000
(II) I810(0): [drm] textures = 0xe0a20000
(II) I810(0): [drm] dma control initialized, using IRQ 16
(II) I810(0): [drm] Initialized kernel agp heap manager, 39583744
(II) I810(0): [dri] visual configs initialized
(II) I810(0): [drm] installed DRM signal handler