[ubuntu-it] Problema 3D con Edgy e matrox g400

[Tullo]

Ciao a tutti, dopo l'aggiornamento a edgy non va + il supporto 3d della
matrox g400, il problema è che mia figlia non può + giocare a
supertux... con conseguenti tragedie familiari.
Ho provato + volte a riconfigurare xorg, ho reinstallato anche i 
pacchetti xorg
e xorg-core ma nulla, quando lancio glxgears per verificare il
funzionamento ottengo:

giorgiatullo a ubuntu:~$ glxgears
libGL warning: 3D driver claims to not support visual 0x4b

con la 6.06 tutto funzionava e non avevo installato driver particolari, 
quelli che propone di default xorg: mga, da quello che ho letto in giro 
sono giusti per questa scheda, avete idea di dove mettere le mani?

Grazie per l'aiuto, qui di seguito il mio file xorg.conf:

Section "Files"
    FontPath   "/usr/share/X11/fonts/misc"
    FontPath   "/usr/share/X11/fonts/cyrillic"
    FontPath   "/usr/share/X11/fonts/100dpi/:unscaled"
    FontPath   "/usr/share/X11/fonts/75dpi/:unscaled"
    FontPath   "/usr/share/X11/fonts/Type1"
    FontPath   "/usr/share/X11/fonts/100dpi"
    FontPath   "/usr/share/X11/fonts/75dpi"
    FontPath   "/usr/share/fonts/X11/misc"
    # path to defoma fonts
    FontPath   "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
EndSection

Section "Module"
    Load   "bitmap"
    Load   "ddc"
    Load   "dri"
    Load   "extmod"
    Load   "freetype"
    Load   "glx"
    Load   "int10"
    Load   "type1"
    Load   "vbe"
EndSection

Section "InputDevice"
    Identifier   "Generic Keyboard"
    Driver      "kbd"
    Option      "CoreKeyboard"
    Option      "XkbRules"   "xorg"
    Option      "XkbModel"   "pc105"
    Option      "XkbLayout"   "it"
EndSection

Section "InputDevice"
    Identifier   "Configured Mouse"
    Driver      "mouse"
    Option      "CorePointer"
    Option      "Device"      "/dev/input/mice"
    Option      "Protocol"      "ExplorerPS/2"
    Option      "ZAxisMapping"      "4 5"
    Option      "Emulate3Buttons"   "true"
EndSection

Section "InputDevice"
   Driver        "wacom"
   Identifier    "stylus"
   Option        "Device"        "/dev/wacom"          # Change to
                                                       # /dev/input/event
                                                       # for USB
   Option        "Type"          "stylus"
   Option        "ForceDevice"   "ISDV4"               # Tablet PC ONLY
EndSection

Section "InputDevice"
   Driver        "wacom"
   Identifier    "eraser"
   Option        "Device"        "/dev/wacom"          # Change to
                                                       # /dev/input/event
                                                       # for USB
   Option        "Type"          "eraser"
   Option        "ForceDevice"   "ISDV4"               # Tablet PC ONLY
EndSection

Section "InputDevice"
   Driver        "wacom"
   Identifier    "cursor"
   Option        "Device"        "/dev/wacom"          # Change to
                                                       # /dev/input/event
                                                       # for USB
   Option        "Type"          "cursor"
   Option        "ForceDevice"   "ISDV4"               # Tablet PC ONLY
EndSection

Section "Device"
    Identifier   "Matrox Graphics, Inc. MGA G400 AGP"
    Driver      "mga"
    BusID      "PCI:1:0:0"
    Option      "OldDmaInit"      "True"
EndSection

Section "Monitor"
    Identifier   "L568"
    Option      "DPMS"
    HorizSync   24-80
    VertRefresh   50-75
EndSection

Section "Screen"
    Identifier   "Default Screen"
    Device      "Matrox Graphics, Inc. MGA G400 AGP"
    Monitor      "L568"
    DefaultDepth   24
    SubSection "Display"
       Depth      1
       Modes      "1280x1024" "1280x960" "1152x864" "1024x768" "800x600"
"640x480"
    EndSubSection
    SubSection "Display"
       Depth      4
       Modes      "1280x1024" "1280x960" "1152x864" "1024x768" "800x600"
"640x480"
    EndSubSection
    SubSection "Display"
       Depth      8
       Modes      "1280x1024" "1280x960" "1152x864" "1024x768" "800x600"
"640x480"
    EndSubSection
    SubSection "Display"
       Depth      15
       Modes      "1280x1024" "1280x960" "1152x864" "1024x768" "800x600"
"640x480"
    EndSubSection
    SubSection "Display"
       Depth      16
       Modes      "1280x1024" "1280x960" "1152x864" "1024x768" "800x600"
"640x480"
    EndSubSection
    SubSection "Display"
       Depth      24
       Modes      "1280x1024" "1280x960" "1152x864" "1024x768" "800x600"
"640x480"
    EndSubSection
EndSection

Section "ServerLayout"
    Identifier   "Default Layout"
    Screen      "Default Screen"
    InputDevice   "Generic Keyboard"
    InputDevice   "Configured Mouse"
    InputDevice     "stylus" "SendCoreEvents"
    InputDevice     "cursor" "SendCoreEvents"
    InputDevice     "eraser" "SendCoreEvents"
EndSection

Section "DRI"
    Mode   0666
EndSection


Tullo
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