When i run xscreensaver-demo and some other applications i get errors 
like this on the terminal from which i ran it:

Xlib:  extension "XFree86-DRI" missing on display ":0.0".
Xlib:  extension "XFree86-DRI" missing on display ":0.0".

I think this has something to do with 3D support, though i'm fairly new 
to configuring X11 for 3D graphics and so am not certain. If anyone has 
ideas on how to fix it, please let me know. I am including my 
/etc/X11/XF86Config-4 below.

I posted on this issue earlier this month (search for subject 
"xscreensaver-demo crashing on Sarge") but got no response. Thanks in 
advance for any assistance.



Section "Files"
        FontPath        "unix/:7100"                    # local font server
        # if the local font server has problems, we can fall back on these
        FontPath        "/usr/lib/X11/fonts/misc"
        FontPath        "/usr/lib/X11/fonts/cyrillic"
        FontPath        "/usr/lib/X11/fonts/100dpi/:unscaled"
        FontPath        "/usr/lib/X11/fonts/75dpi/:unscaled"
        FontPath        "/usr/lib/X11/fonts/Type1"
        FontPath        "/usr/lib/X11/fonts/CID"
        FontPath        "/usr/lib/X11/fonts/Speedo"
        FontPath        "/usr/lib/X11/fonts/100dpi"
        FontPath        "/usr/lib/X11/fonts/75dpi"
EndSection
Section "Module"
        Load    "GLcore"
        Load    "bitmap"
        Load    "dbe"
        Load    "ddc"
        Load    "dri"
        Load    "extmod"
        Load    "freetype"
        Load    "glx"
        Load    "int10"
        Load    "record"
        Load    "speedo"
        Load    "type1"
        Load    "vbe"
EndSection
Section "InputDevice"
        Identifier      "Generic Keyboard"
        Driver          "keyboard"
        Option          "CoreKeyboard"
        Option          "XkbRules"      "xfree86"
        Option          "XkbModel"      "pc104"
        Option          "XkbLayout"     "us"
EndSection
Section "InputDevice"
        Identifier      "Configured Mouse"
        Driver          "mouse"
        Option          "CorePointer"
        Option          "Device"                "/dev/psaux"
        Option          "Protocol"              "ImPS/2"
        Option          "ZAxisMapping"          "4 5"
EndSection
Section "InputDevice"
        Identifier      "Generic Mouse"
        Driver          "mouse"
        Option          "SendCoreEvents"        "true"
        Option          "Device"                "/dev/input/mice"
        Option          "Protocol"              "ImPS/2"
        Option          "ZAxisMapping"          "4 5"
EndSection
Section "Device"
        Identifier      "Intel Corp. 82810E DC-133 CGC [Chipset Graphics 
Controller]"
        Driver          "i810"
EndSection
Section "Monitor"
        Identifier      "Generic Monitor"
        HorizSync       30-60
        VertRefresh     50-75
        Option          "DPMS"
EndSection
Section "Screen"
        Identifier      "Default Screen"
        Device          "Intel Corp. 82810E DC-133 CGC [Chipset Graphics 
Controller]"
        Monitor         "Generic Monitor"
        DefaultDepth    24
        SubSection "Display"
                Depth           1
                Modes           "1024x768"
        EndSubSection
        SubSection "Display"
                Depth           4
                Modes           "1024x768"
        EndSubSection
        SubSection "Display"
                Depth           8
                Modes           "1024x768"
        EndSubSection
        SubSection "Display"
                Depth           15
                Modes           "1024x768"
        EndSubSection
        SubSection "Display"
                Depth           16
                Modes           "1024x768"
        EndSubSection
        SubSection "Display"
                Depth           24
                Modes           "1024x768"
        EndSubSection
EndSection
Section "ServerLayout"
        Identifier      "Default Layout"
        Screen          "Default Screen"
        InputDevice     "Generic Keyboard"
        InputDevice     "Configured Mouse"
        InputDevice     "Generic Mouse"
EndSection
Section "DRI"
        Mode    0666
EndSection

-- 
------------------------------------------------------------------------
Dan Ramaley
Digital Media Library Specialist
(515) 271-1934
Cowles Library 140, Drake University


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