** Summary changed:

- [R600 HD 2600] R600 does not support composite - "Desktop effects could not 
be enabled"
+ [R600 HD 2600] R600/R700 does not support composite - "Desktop effects could 
not be enabled"

** Description changed:

- I am using the Intrepid Ibex prerelease (fully up to date as at 7 Oct
- 2008). My laptop is a Gateway M-Series, with a Core 2 Duo...and an ATI
- Mobility Radeon HD 2600 graphics card.
+ [Problem]
+ As can be seen at http://wiki.x.org/wiki/RadeonFeature, 3D support that 
compiz requires is listed as a work-in-progress for R600/R700 class chips.  It 
requires a mesa driver to support this family of chips, which is on the todo 
list upstream but won't be available for Jaunty.
+ 
+ Render-based compositers (like metacity) should work fine, at least as
+ of 6.11.0.
+ 
+ [Original Report]
+ I am using the Intrepid Ibex prerelease (fully up to date as at 7 Oct 2008). 
My laptop is a Gateway M-Series, with a Core 2 Duo...and an ATI Mobility Radeon 
HD 2600 graphics card.
  
  When I attempt to enable desktop effects, I get a message that "Desktop
  effects could not be enabled."
  
  [lspci]
  00:00.0 Host bridge [0600]: Intel Corporation Mobile PM965/GM965/GL960 Memory 
Controller Hub [8086:2a00] (rev 03)
  01:00.0 VGA compatible controller [0300]: ATI Technologies Inc M76 [Radeon 
Mobility HD 2600 Series] [1002:9581]
        Subsystem: Gateway 2000 Device [107b:0562]
  
  My xorg.conf file follows:
  Section "ServerLayout"
        Identifier     "X.org Configured"
        Screen      0  "Screen0" 0 0
        InputDevice    "Mouse0" "CorePointer"
        InputDevice    "Keyboard0" "CoreKeyboard"
  EndSection
  
  Section "Files"
        ModulePath   "/usr/lib/xorg/modules"
        FontPath     "/usr/share/fonts/X11/misc"
        FontPath     "/usr/share/fonts/X11/cyrillic"
        FontPath     "/usr/share/fonts/X11/100dpi/:unscaled"
        FontPath     "/usr/share/fonts/X11/75dpi/:unscaled"
        FontPath     "/usr/share/fonts/X11/Type1"
        FontPath     "/usr/share/fonts/X11/100dpi"
        FontPath     "/usr/share/fonts/X11/75dpi"
        FontPath     "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
  EndSection
  
  Section "Module"
        Load  "glx"
        Load  "xtrap"
        Load  "dbe"
        Load  "dri"
        Load  "extmod"
        Load  "record"
  EndSection
  
  Section "InputDevice"
        Identifier  "Keyboard0"
        Driver      "kbd"
  EndSection
  
  Section "InputDevice"
        Identifier  "Mouse0"
        Driver      "mouse"
        Option      "Protocol" "auto"
        Option      "Device" "/dev/input/mice"
        Option      "ZAxisMapping" "4 5 6 7"
  EndSection
  
  Section "Monitor"
        Identifier   "Monitor0"
        VendorName   "Monitor Vendor"
        ModelName    "Monitor Model"
  EndSection
  
  Section "Device"
          ### Available Driver options are:-
          ### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
          ### <string>: "String", <freq>: "<f> Hz/kHz/MHz"
          ### [arg]: arg optional
          #Option     "NoAccel"                 # [<bool>]
          #Option     "SWcursor"                # [<bool>]
          #Option     "Dac6Bit"                 # [<bool>]
          #Option     "Dac8Bit"                 # [<bool>]
          #Option     "BusType"                 # [<str>]
          #Option     "CPPIOMode"               # [<bool>]
          #Option     "CPusecTimeout"           # <i>
          #Option     "AGPMode"                 # <i>
          #Option     "AGPFastWrite"            # [<bool>]
          #Option     "AGPSize"                 # <i>
          #Option     "GARTSize"                # <i>
          #Option     "RingSize"                # <i>
          #Option     "BufferSize"              # <i>
          #Option     "EnableDepthMoves"        # [<bool>]
          #Option     "EnablePageFlip"          # [<bool>]
          #Option     "NoBackBuffer"            # [<bool>]
          #Option     "DMAForXv"                # [<bool>]
          #Option     "FBTexPercent"            # <i>
          #Option     "DepthBits"               # <i>
          #Option     "PCIAPERSize"             # <i>
          #Option     "AccelDFS"                # [<bool>]
          #Option     "DDCMode"                 # [<bool>]
          #Option     "IgnoreEDID"              # [<bool>]
          #Option     "DisplayPriority"         # [<str>]
          #Option     "PanelSize"               # [<str>]
          #Option     "ForceMinDotClock"        # <freq>
          #Option     "ColorTiling"             # [<bool>]
          #Option     "VideoKey"                # <i>
          #Option     "RageTheatreCrystal"      # <i>
          #Option     "RageTheatreTunerPort"    # <i>
          #Option     "RageTheatreCompositePort"        # <i>
          #Option     "RageTheatreSVideoPort"   # <i>
          #Option     "TunerType"               # <i>
          #Option     "RageTheatreMicrocPath"   # <str>
          #Option     "RageTheatreMicrocType"   # <str>
          #Option     "ScalerWidth"             # <i>
          #Option     "RenderAccel"             # [<bool>]
          #Option     "SubPixelOrder"           # [<str>]
          #Option     "ShowCache"               # [<bool>]
          #Option     "DynamicClocks"           # [<bool>]
          #Option     "VGAAccess"               # [<bool>]
          #Option     "ReverseDDC"              # [<bool>]
          #Option     "LVDSProbePLL"            # [<bool>]
          #Option     "AccelMethod"             # <str>
          #Option     "DRI"                     # [<bool>]
          #Option     "ConnectorTable"          # <str>
          #Option     "DefaultConnectorTable"   # [<bool>]
          #Option     "DefaultTMDSPLL"          # [<bool>]
          #Option     "TVDACLoadDetect"         # [<bool>]
          #Option     "ForceTVOut"              # [<bool>]
          #Option     "TVStandard"              # <str>
          #Option     "IgnoreLidStatus"         # [<bool>]
          #Option     "DefaultTVDACAdj"         # [<bool>]
          #Option     "Int10"                   # [<bool>]
        Identifier  "Card0"
        Driver      "radeon"
        VendorName  "ATI Technologies Inc"
        BoardName   "M76 [Radeon Mobility HD 2600 Series]"
        BusID       "PCI:1:0:0"
  EndSection
  
  Section "Screen"
        Identifier "Screen0"
        Device     "Card0"
        Monitor    "Monitor0"
        SubSection "Display"
                Viewport   0 0
                Depth     1
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     4
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     8
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     15
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     16
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     24
        EndSubSection
  EndSection

-- 
[R600 HD 2600] R600/R700 does not support composite - "Desktop effects could 
not be enabled"
https://bugs.launchpad.net/bugs/279762
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